Page 174 - TB_5B
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c . c . Sample Answer
d. Unit 20. Adding and Subtracting Decimals
Activity 3 P. 28~29
1 . a . Sample Answer
The total cost can be calculated by adding up
b . Sample Answer the cost of each item. The change can be
calculated by subtracting the cost of the meal
from the amount of money that a person pays.
P. 25~26
Total Cost Money Change
$ 10.00 $15.00 $ 15.00
$ 2.55 $20.00 $ 12.55
$ 12.55 $ 2.45
$45.00
$ 15.50 $ 20.00
$ 1.20 $ 16.70
$ 16.70 $ 3.30
$ 18.00 $ 45.00
$ 18.00 $ 38.82
$ 2.82 $ 6.18
$ 38.82
Activity 1 b . 33.525 P. 30~31
1 . a . 39.25
2 . a . 65.15 c . 43.34
3 . a . 28.187
b . 168.919 c . 70.818
c . 0.692
b . 635.837
d . 17.797
Answers 163
c . c . Sample Answer
d. Unit 20. Adding and Subtracting Decimals
Activity 3 P. 28~29
1 . a . Sample Answer
The total cost can be calculated by adding up
b . Sample Answer the cost of each item. The change can be
calculated by subtracting the cost of the meal
from the amount of money that a person pays.
P. 25~26
Total Cost Money Change
$ 10.00 $15.00 $ 15.00
$ 2.55 $20.00 $ 12.55
$ 12.55 $ 2.45
$45.00
$ 15.50 $ 20.00
$ 1.20 $ 16.70
$ 16.70 $ 3.30
$ 18.00 $ 45.00
$ 18.00 $ 38.82
$ 2.82 $ 6.18
$ 38.82
Activity 1 b . 33.525 P. 30~31
1 . a . 39.25
2 . a . 65.15 c . 43.34
3 . a . 28.187
b . 168.919 c . 70.818
c . 0.692
b . 635.837
d . 17.797
Answers 163
