McGraw Hill Math Grade 4 Chapter 10 Lesson 7 Answer Key Problem Solving: Draw a Picture and Write an Equation

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McGraw-Hill Math Grade 4 Answer Key Chapter 10 Lesson 7 Problem Solving: Draw a Picture and Write an Equation

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Question 1.
Elsa is knitting a blanket. She used 4$$\frac{3}{8}$$ meters of red yarn and 2$$\frac{4}{8}$$ meters of gold yarn. How many meters of yarn did she use altogether?
6$$\frac{7}{8}$$ meters

Explanation:
Elsa is knitting a blanket
She used 4$$\frac{3}{8}$$ meters of red yarn and
2$$\frac{4}{8}$$ meters of gold yarn
Add to find the total number of meters of yarn
4$$\frac{3}{8}$$ + 2$$\frac{4}{8}$$ = 6$$\frac{7}{8}$$ meters
So, Elsa used 6$$\frac{7}{8}$$ meters of yarn altogether.

Question 2.
Katia is building a tree house. She needs 52 boards. Each board has to be 4 meters long. How much wood does Katia need?
208 meters of wood

Explanation:
Katia is building a tree house
She needs 52 boards
Each board has to be 4 meters long
Multiply to find
52 x 4 = 208
So, Katia used 208 meters of wood.

Question 3.
Ms. Morton has 167$$\frac{3}{5}$$ cm of string. She cuts the string into two pieces. One piece is 72$$\frac{1}{5}$$ cm long. How long is the other piece?
Ms. Morton has 167$$\frac{3}{5}$$ cm of string
One piece is 72$$\frac{1}{5}$$ cm long
167$$\frac{3}{5}$$ – 72$$\frac{1}{5}$$ = 95$$\frac{2}{5}$$
So, the other piece is 95$$\frac{2}{5}$$.