Page 71 - NUMINO TG_6A
P. 71
Activity 3 Word Problems
jOb ective Solve word problems that have fractions.
1. Textbook Instructions Activity 3 Word Problems
Have students see how expressions can be derived from word problems.
Have them follow the steps and look at the pictures to solve the problems.
Students will solve word problems that use You had a piece of rope that was 20 1 m long. You used 6 1 m of the
2 4
fractions. Have the students use the problem rope to tie a box. Then the remaining rope was divided into 3 equal parts
solving method to solve the word problems. and given to your three friends. How many meters of rope did each friend
Understand the Question receive?
Q: What do you need to find?
A: How many meters of rope did each 20_12 m
friend receive?
Q: Read the problem again. What do you
know? How many meters of rope remained after tying the box?
Length
A: of the original rope: 20 1 meters 6_14 m 20 1 6 1 = (20 6) · 1 1 ‚
2 2 4 2 4
?
1
Amount of rope used: 6 4 meters = 14 1
4
Number of friends the rope was divided
for: Three friends = 14 1
4
Plan the Process
Q: How will you solve the problem?
A: Subtracting and dividing fractions.
Solve the Problem The remaining rope was divided into three equal parts.
The amount of rope
left is 14 1 meters. ·20 1 6 1 3= 1 3
4 2 4 4
1 1 1 ‚ 14
2 4 4
20 6 14
In order to give the remaining amount to 3 = 57 1
4 3
friends, the rope must be divided by 3.
14 1 3 4 3 = 4 3
4 4 4
Each person will get 4 3 meters of rope. 3
4 4
Look Back How many meters of rope did each friend receive? 4 m
Q: Does your answer make sense? Explain
how you solved the problem. 34
2. Build Understanding
Problem: A truck drives 7 1 km in 6 minutes. If the truck continues to drive at the same speed, how far will
5
it be in 20 minutes?
Solution: Distance in 20 minutes Distance in 1 minute 20
6 4
7 1 6 20 36 1 20 24 km
5 5 6
1 1
Answer: The truck will have driven 24 km in 20 minutes.
054 NUMINO Teacher s Guide
jOb ective Solve word problems that have fractions.
1. Textbook Instructions Activity 3 Word Problems
Have students see how expressions can be derived from word problems.
Have them follow the steps and look at the pictures to solve the problems.
Students will solve word problems that use You had a piece of rope that was 20 1 m long. You used 6 1 m of the
2 4
fractions. Have the students use the problem rope to tie a box. Then the remaining rope was divided into 3 equal parts
solving method to solve the word problems. and given to your three friends. How many meters of rope did each friend
Understand the Question receive?
Q: What do you need to find?
A: How many meters of rope did each 20_12 m
friend receive?
Q: Read the problem again. What do you
know? How many meters of rope remained after tying the box?
Length
A: of the original rope: 20 1 meters 6_14 m 20 1 6 1 = (20 6) · 1 1 ‚
2 2 4 2 4
?
1
Amount of rope used: 6 4 meters = 14 1
4
Number of friends the rope was divided
for: Three friends = 14 1
4
Plan the Process
Q: How will you solve the problem?
A: Subtracting and dividing fractions.
Solve the Problem The remaining rope was divided into three equal parts.
The amount of rope
left is 14 1 meters. ·20 1 6 1 3= 1 3
4 2 4 4
1 1 1 ‚ 14
2 4 4
20 6 14
In order to give the remaining amount to 3 = 57 1
4 3
friends, the rope must be divided by 3.
14 1 3 4 3 = 4 3
4 4 4
Each person will get 4 3 meters of rope. 3
4 4
Look Back How many meters of rope did each friend receive? 4 m
Q: Does your answer make sense? Explain
how you solved the problem. 34
2. Build Understanding
Problem: A truck drives 7 1 km in 6 minutes. If the truck continues to drive at the same speed, how far will
5
it be in 20 minutes?
Solution: Distance in 20 minutes Distance in 1 minute 20
6 4
7 1 6 20 36 1 20 24 km
5 5 6
1 1
Answer: The truck will have driven 24 km in 20 minutes.
054 NUMINO Teacher s Guide
