Page 184 - TB_5B

NUMINO

Activity 2 P. 118~119 Number of Pens Total Price ($)
4
1 . a . V (8 8 8) (3 4 8) 6 4 0.5
8
512 96 10 6 0.50
416 (m3) x 8 0.50
10 0.50
b . A (5 4) (3 2) x 0.50

20 6 Chocolate bar Ice cream cone Total Price ($)
14 23
45 2 33 4
V s h 14 5 67
70 (yd3) 89 4 35 4
6 37 4
c . V (10 6 6) (2 3 6) 2 8 39 4

360 72 a b a 3b 4
288 (cm3)
The total price of chocolate bars and ice cream
Activity 3 P. 120~121 cones can be found by (number of chocolate
bars) $3 (number of ice cream cones) $4.
1 . a . 288 Since the amount of money that Kate needs to
pay depends on the number of chocolate bars
b . 15, 5, 75 and ice cream cones, let a stand for chocolate
bars and b for ice cream cones. The amount of
c. 6 money that Kate needs to pay can be found by
a 3 b 4 (dollars).
2 . a . (3 4 7) (3 4 5) 24 (cm3)

b . (6 8 8) (3 8 8) 192

192 5 38.4 (in.3)

c . 75 (5 3) 5 (cm) Base Height Area
2 2
Unit 30. Algebraic Expressions 3 4 222
4 6
5 8 342
x y 462
582
xy2

P. 122~123

Time (min.) Distance (m) Activity 1 P. 124~125
1
2 1 300 a, 40 c . 6x
3 f . ghp
4 2 300 1. a. z 3
3 300 b. 4 b
4 300 c. x y

a a 300 2 . a . 3x b . 4y
d . 3xy e . 4ab
The distance traveled at the speed of
300 m per minute is (time traveled) 300.
The distance traveled will depend on the speed
of traveling.
If a is the travel time, the distance traveled is
a 300.

Answers 173