Grade 4 - Progress in Mathematics

Divide with Money

13-10

Martin designs greeting cards. They cost

$0 .50 each if you buy them separately,

or you can buy a box of 25 cards

for $12. Which is the better buy?

To find which is the better bu y, find the

cost of one boxed card. Then compare

the cost to $0 .50.

To find the cost of one boxed card,

divide: $12 
 25

Before dividing, Divide as usual.

write a decimal point Write the dollar sign

and two zeros and decimal point

in the dividend. in the quotient. Check.

$0.48

 25

2 40

 9 6

$ 12.00

$ 0.48 $ 0.50

So the better buy is a box of 25 cards for $ 12.

Study this example.

8 
.$ 1  8 . 0  0

$. 48

25 
.$ 1  2 . 0  0

 10. 0

2. 00

 2. 00

$ 2.25

8 
.$ 1  8 . 0  0

 16

2. 0

 1. 6

40

 40

25 
.$ 1  2 . 0  0

3.4

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