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McGraw-Hill Math Grade 3 Answer Key Chapter 7 Lesson 7 Problem Solving
Solve
Draw pictures to help solve the problems.
Question 1.
Rob cuts a rope into 8 pieces. Each piece is 8 feet long. How long was the rope before Rob cut it? Write a division equation with a letter for the unknown number.
DRAWING
Answer:
1 feet
Explanation:
let the unknown length be m
m = 8 ÷ 8
m = 1 feet
each piece is one feet long
Question 2.
Hannah connects 7 pieces of pipe. Each piece is the same length. When the pieces are all connected, the pipe is 28 feet long from end to end. How long is each piece? Write a multiplication equation with a letter for the unknown number.
DRAWING
Answer:
Explanation:
let the unknown length be m
7 pieces of pipe
the pipe is 28 feet long
m = 28 ÷ 7
m = 4
each piece is 4 feet.