Page 72 - NUMINO TG_6A

04With Parentheses Unit

Have students derive their own expressions from the word problems. Check the expressions

and answers. Have them refer to the example on the previous page for help. 1. Have the students solve the word
problems using the problem on p34 as an
1 . Solve the word problems. example.

a. Thomas had 4L of milk. He drank 1 1 L, and his four friends equally
3

shared the remaining milk. How many liters of milk did each friend drink?

4 L 1_13 L 1a. Have the students keep the example
below in mind when subtracting fractions
from whole numbers.

·4 1 1 ‚ 4= 2 (4 1 1 ) 4 3 3 1 1 ) 4
3 3 3 3 3

Each friend drank 2 L of milk. 2 2 4
3 3

3 1 81
4 2 34

b. You had 8 yd of string. You used 2 yd, and your five friends equally 2
3
divided the remaining string. How many yards of string did each friend get?

·8 3 2 1 ‚ 5 = 1 1
4 2 4

Each friend got 1 1 yd of string.
4

c. You had 3 1 L of juice. You added 5 L of juice, and your six friends
2 6

equally shared the juice. How many liters of juice did each friend drink?

·3 1 5 ‚ 6 = 13
2 6 18

Each friend drank 13 L of juice.
18

4. With Parentheses 35

Problem: A basket of 9 apples weighs 3 2 kg. If the empty basket weighs 1 kg, find how many kg each
5

apple is.

Solution: An empty basket weighs 1 kg, so (Weight of apples) 3 2 1 2 2 kg
5 5

(Weight of 1 apple) (Weight of apples) (Number of apples)

4 2 2 9 12 1 4 kg
15 5 5 9 15
Answer: Each apple weighs kg.

6A Unit 04 055