Math Is Fun Forum

Sarah Rebekah 13

Guest

Money Math

Jill Has 9 Quarters,2dimes,2 pennies.how does she have?

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Money Math

Hi Sarah Rebekah 13;

She has in cents:

9 * 25 + 2 * 10 + 2 * 1

225 + 20 + 2 = 247 cents = 2.47 dollars

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Sarah Rebekah 13

Guest

Re: Money Math

Thanks for,the help.

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Money Math

Hi Sarah,

Did you understand it? Or do you need more explanation?

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Sarah Rebekah 13

Guest

Re: Money Math

I need A little more  explanation

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Money Math

Hi Sarah;

Jill has 9 Quarters:

Q + Q + Q + Q + Q + Q + Q + Q + Q  each Quarter is worth 25 cents.

Jill has 2 dimes

D + D   each is worth 10 cents

Jill has 2 pennies

P + P  each is worth 1 cent. Lets add them all up.

    25
    25
    25
    25
    25
    25
    25
    25
    25
    10
    10
      1
+    1
---------
      7

Carry the 4:

    4
    25
    25
    25
    25
    25
    25
    25
    25
    25
    10
    10
      1
+    1
---------
  2.47

Is this clear? Hope the columns lined up right on your browser.

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Sarah Rebekah 13

Guest

Re: Money Math

Thanks yes it is clear.an they line up

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Money Math

Hi Sarah;

So you should see why it is easier to multiply then to add all those coins. Supposing you had 1424 quarters, you would run out of paper. So please check my post #2 again.

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Sarah Rebekah 13

Guest

Re: Money Math

Ok Thanks Again