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Math for Parents Math for Teachers Personal Finance

Wooden Sandals: A math lesson

When I was a teenager in the 1980s, I wanted a pair of tan Dr. Scholl’s sandals so badly I could taste it.  Each time my mother took us to the Eckerd drug store, I made sure to stroll down that aisle to check them out.

“Those are the dumbest shoes I’ve ever seen in my life,” Mom said, and she flat out refused to buy them for me.

Today, I’d have to agree.  With hard, wooden soles and an adjustable strap that featured a gold buckle and grommets, these were not what Tim Gunn would consider classic fashion pieces.

But I wanted those shoes dearly.

They cost $14.95—pricy for a kid with no job and a $1 a week allowance.  My mom suggested I save up my own money for them.  But savings from my February birthday was long gone, and by the time I saved enough allowance, summer would be over.  These shoes were definitely not fall footwear.

So, my mother came up with another idea: to ask my father for a loan. And that’s exactly what I did.

Both of my parents were educators—my mother an elementary school librarian and my father a division chair and sometimes-teacher at the local community college.  It’s fair to say that the man never missed an opportunity to give me a lesson about money management.  And these lessons also often included a little bit of math.

The Dr. Scholl’s loan was no different.

Instead of giving me the money outright and keeping my allowance for the next 15 weeks, I got a simple-interest loan that was to be paid within a certain time period.  I don’t remember how long the term or what the interest rate was. But I did continue to receive my weekly allowance and paid a portion of that amount each week for the loan.  Dad even helped me calculate how much more I’d be paying for the sandals with the interest.

As a kid who only wanted her hands on a pair of fad sandals, I thought this was overly complex.  But my desire for those shoes was great, and this was the only way I’d get them.  So I agreed.  I signed the contract he wrote out by hand and paid off that loan, plus the interest, bit by bit.

Today, as the parent of an 11-year-old daughter, I’m amazed by my father’s foresight.  It really is a brilliant little trick, and one that has served me very, very well.

Six years later, my dad took me down to the Bank of Speedwell to get a loan for my first car—a 1984 Toyota Camry that I bought from my aunt for $2,000.   This time he explained compound interest, just before he cosigned for the loan.

And that lesson didn’t stop with me.  Two years later, my sister gave me the most amazing gift when I graduated from college—an upright piano that she purchased from a neighbor.  She paid Bud and Ginia Cabell $20 a month for I don’t know how long.  (And now my daughter plays Mozart waltzes on that very instrument.)

Dad with my niece Addison in 2006

The thing that I know about my dad is that he wasn’t afraid to delve into the tough stuff with us—including managing our money.  That often required a few calculations, and I often resisted his lessons.

When it came to these little real-world lessons, I’m sure I was a royal pain in the you-know-where, but in the end, those experiences were much more meaningful than anything I learned in school—and they were less expensive than anything I could learn on my own.

My daughter hasn’t asked for her version of ugly, wooden sandals, but I’m waiting for that moment.  And when she does, I’ll be ready with a contract and a little lesson in simple interest and regular payments.

Did you get any surprise lessons like this one when you were little?  Or do you have plans to do something similar with your own kids — or grandkids, nieces, nephews, neighborhood kids?  Share your stories in the comments sections below.

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Personal Finance

Reducing the Emotional Punch of Caregiving — with Math

Photo courtesy of Ollie Crayfoord

On Friday, I was guest poster at The Cheerful Caregiver, a great blog for folks who are serving as caregivers for ill family members and friends.  

Every caregiving situation is unique, filled with distinctive obstacles and one-of-a-kind blessings. But one thing is for sure: No matter how simple your situation, caregiving is stressful, emotional and sometimes overwhelming.

Trouble is it’s often in the middle of those difficult emotions that you have to make the toughest decisions. And that’s also when the strain of caregiving starts to affect the rest of your life—making it doubly difficult to take care of yourself.

Believe it or not, math can be your best friend here. Yes, I said math.

Because, while math is not always black-and-white, it can help you tap into the practical, logical side of your brain that you need to make solid decision—and lower your stress.

Trust me: you only need the simple stuff, and you only need to do what works for you. Here are some examples.

Read the rest of the post at The Cheerful Caregiver.  (She’s giving away a copy of my book, too!)

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Personal Finance

Math and the Gender Gap: Does it affect financial planning?

So let’s get one thing straight right away: men are not inherently better at math than women. And as our mothers and grandmothers and daughters have shown, women are not inherently bad at managing their finances.

But there are some ways that men and women experience and perhaps think about math differently. And those differences may affect how they approach financial decisions.

Read the rest of my guest post on Susan Weiner’s Investment Blog.  And comment!

Would you like me to guest post at your blog?  Or do you know of a blog that I would fit right in with? I’ve got lots of ideas to share with anyone who will listen! And I promise I’m a good guest.  I wipe out the sink after I brush my teeth and don’t mind if the cat sleeps on my pillow.  Get the details here.

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Math for Grownups Personal Finance

Film Friday: What do the unemployment numbers really say?

Earlier this month, I did a podcast with Arin Greenwood at Out of the Storm News.  We talked about how math confidence can help folks make good financial decisions–and how if you don’t trust your math abilities, you may avoid the math and make poor financial decisions.

And in June, I did a guest post for Michelle Rafter at WordCount, about the 5 math skills that all journalists need to master.  Again, with solid math skills, journalists can better report the stories we need to read or watch or listen to.

Today’s Film Friday kind of brings those two ideas together, with a twist.  The popular and brilliant Khan Academy breaks down the unemployment numbers in a way that can really help you understand what they really mean.

It’s kind of depressing but definitely worth 12 minutes of your time.

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Personal Finance

4 Math Tricks to Keep You Frugal

Photo courtesy of dmdonahoo.

If you’ve started down the frugality path, you have probably already been smacked in the face with one unavoidable fact: there’s math involved in living within or below your means.  For some, this is no biggie.  For others, this could very well be the difference between saving a little and saving a lot.

But even if your basic math skills are rusty, you can handle these calculations, no problem.  A few simple tricks will help you stay frugal and even take it up a notch!

Read the rest of the post here.

How has math helped you be frugal? Share your ideas in the comments section here or at Suddenly Frugal!

Would you like me to guest post at your blog?  Or do you know of a blog that I would fit right in with? I’ve got lots of ideas to share with anyone who will listen! And I promise I’m a good guest.  I wipe out the sink after I brush my teeth and don’t mind if the cat sleeps on my pillow.  Get the details here.

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Personal Finance

Math and Politics: What’s the connection?

Photo courtesy of Jay Tamboli

Today, I’m a guest on Arin Greenwood‘s FIRE podcast at The Heartland Institute and Out of the Storm News.  We talk about the expected stuff at first–how math can keep more money in your pocket and how grownups pass down our anxieties and hatred of math to the next generation.  But then we get into what I thought was a cool discussion about math and politics.  Having some math sense may very well make us a smarter and more responsible electorate!

Here’s how.

So now I have another trick up my sleeve–podcasts.  I’d love to chat with you for your blog or radio program.  Or if you know of a reporter, journalist, blogger who needs a mathy person to talk about this stuff, I’m the gal! I’m guest posting all over the place, too.  Get the details here.

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Personal Finance

Credit + Debt: A challenging math equation

Photo courtesy of The Consumerist

There may be no more confusing place for math than with credit and debt — and there may be no more important place for A+ math skills than with your money.  That’s why I was asked to guest post at credit.com’s News+Advice blog today.

In my post, I discuss three ways that having some math skills — and a little dose of confidence — can help you make better decisions about what you owe and how you’ll pay it off.

Please join me at credit.com, and ask your questions there or in the comments section here!

Math for Grownups: A Simple Approach to Your Debt and Finances

By the way, would you like me to guest post at your blog?  Or do you know of a blog that I would fit right in with? I’ve got lots of ideas to share with anyone who will listen! And I promise I’m a good guest.  I wipe out the sink after I brush my teeth and don’t mind if the cat sleeps on my pillow.  Get the details here.  

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Math for Parents Personal Finance

Virtual book tour: Frisco Kids

Photo courtesy of cogdogblog

Today, I’m visiting Frisco Kids, a blog written by my friend and fellow freelancer, Debbie Abrams Kaplan. She has posted a Q&A with me about Math for Grownupsand as well as my thoughts about kids and math.  I hope you’ll visit and even post a comment!

Q&A — Math for Grownups by Laura Laing

By the way, would you like me to guest post at your blog?  Or do you know of a blog that I would fit right in with? I’ve got lots of ideas to share with anyone who will listen! And I promise I’m a good guest.  I wipe out the sink after I brush my teeth and don’t mind if the cat sleeps on my pillow.  Get the details here

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Math for Grownups Math for Teachers Personal Finance

Special Sunday Edition: Debt, deficit and debt ceiling

Photo courtesy of iDanSimpson

I don’t usually post on Sundays, but with Geithner’s debt-ceiling deadline looming on Tuesday, I wanted to share this really great video.  Using some math and graphs, the narrator explains the debt, deficit and debt ceiling in ways that even your 4th grader can understand.

It’s a little long — almost 10 minutes — but trust me, it’s not full of the gobbledy-gook that economists are sometimes famous for.  You will be smarter after you watch it.  Promise.

Questions?  Ask them in the comment section.  (But please skip the political comments. Math is neither Democrat nor Republican.)

Also, be sure to come back tomorrow for an exciting August announcement!

Categories
Personal Finance

Film Friday: Deficit, debt and math

As I was planning my posts for the week, I came across this fantastic video about the U.S. deficit and debt.  At first I had it scheduled for Friday, but with Geithner’s debt ceiling deadline looming on Tuesday, I decided you would probably benefit from seeing it sooner.  Who knows what will happen this week, right?

No matter what happens, you may have been wondering about the math involved with the deficit, debt and debt ceiling.  This handy video will lead the way.  It’s a bit long — almost 10 minutes — but very easy to follow and worth every second.  You’ll end up being  a much smarter person for watching it!

Questions? Ask them in the comments section! (But keep the political commentary for another site, please.)

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Personal Finance Work

Is Your Boss Ripping You Off?

In last Friday’s Open Thread discussion, Gretchen posted this question:

My husband’s company does not provide health insurance for me and the kids, which is a $12,000 value. In his field, there is a salary scale based on education, number of years experience, geography, etc. The salary scale assumes that the employer provides health insurance for the family. His salary is currently at 79% of the scale, and his employer wants to eventually get him up to 100%. But that doesn’t include the insurance, so it won’t really be at 100% and is not now really at 79%. But I can’t figure out which way to do the math so he can show them the actual percentage. They’re saying he’s at 79 percent. I’m saying it’s lower because they aren’t accounting for that $12K.

All of that boils down to this: What percent of the salary scale is Gretchen’s husband actually making, given that he, and not his employer, pays the $12,000 bill for insurance? There are two steps to this problem:

1. Find the actual salary that is at 100% of the scale.

2. Find the actual percent of Gretchen’s husband’s salary, minus the cost of insurance.

I’m going to tell you up front that we’re going to use a proportion here.  What is  proportions?  A proportion is two equal ratios.  So, if you have two fractions with an equal sign between them, you have a proportion.

And how did I know to use a proportion?  Well, my big clue was that we’re working with percents.  Percent means “per one hundred,” and per one hundred means “out of one hundred,” which just means, “put the percent value over 100.” In other words:

79% = 79/100

The tricky part is figuring out what the proportions should be.

Step 1:

salary/x = 79/100,

where “salary” is Gretchen’s husband’s salary, and x is the top salary on the scale.

That’s because the company assumes that your husband’s salary is 79% of the scale. (Notice this: “salary” and “79″ are in the numerators — or top values of the fractions.)

To solve this proportion, we need to plug in Gretchen’s husband’s salary and then solve for x. In order to make this easy to explain, I’m going to assume that his salary is $100,000.

substitute:   {$100,000}/x = 79/100 cross multiply:   {$100,000*100} = 79x simplify:     {$10,000,000} = 79x solve for x:     $126,582 = x

So if his salary is $100,000, the top salary on the scale is $126,582.

Step 2:

{$100,000-12,000}/{126,582} = p/100,

where p is the actual percent of the scale.

Let’s look carefully at this proportion: The first ratio is just the salary minus the cost of insurance, over the max salary in the scale.  (That’s what we found in step 1.)  The second ratio is just like the second ratio in step 1, except that we don’t know what the percent is.

Now, pay close attention to this.  Check the top numbers to be sure they match. We want to know the actual percent of the scale that Gretchen’s husband is making — and that’s what’s represented in the top number of each ration.

Check the bottom numbers to be sure they match.  Do they?  Why yes!  Yes they do!  That’s because $126,582 is 100% of the salary scale.

(Unlike my 10-year-old daughter’s outfits, math is very matchy-matchy.  Knowing that will help you organize your problems and check to see if they’re set up properly.)

Now all we need to do is solve for p.

simplify:    {$88,000}/{126,582} = p/100 cross multiply:     {$88,000*100} = {126,582p} simplify:       {$8,800,000} = {126,582p} solve for p:       69.5 = p

So what does this mean? If Gretchen’s husband makes $100,000 a year and is paying $12,000 for insurance, he’s earning 69.6% of the salary scale.

If you made it this far, you get a gold star!  Pat yourself on the back, and take the rest of the day off.  This is a complex problem that depends on an understanding of proportions and how to solve for a variable in an algebraic equation.

Never fear!  I’ll unravel some of these mysteries in later blog posts.  And of course, if you have a question, ask it in the comments section!