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McGraw-Hill Math Grade 3 Answer Key Chapter 4 Lesson 9 Problem Solving
Solve.
Draw pictures to help you solve these problems.
Question 1.
Franz bought 3 bags of lemons. Each bag has 7 lemons. How many lemons does he have in all?
21 in all
3 × 7 = 21 lemons
Answer:
Number of lemons he have in all = 21.
Explanation:
Number of lemons of bags Franz bought = 3.
Number of lemons in each bag = 7.
Number of lemons he have in all = Number of lemons of bags Franz bought × Number of lemons in each bag
= 3 × 7
= 21.
Question 2.
The zoo has 11 black bears and 13 brown bears. How many bears live at the zoo?
_____ in all
____ + ____ = ____ bears
Answer:
Total number of bears in the zoo = 24.
Explanation:
Number of black bears in the zoo = 11.
Number of brown bears in the zoo = 13.
Total number of bears in the zoo = Number of black bears in the zoo + Number of brown bears in the zoo
= 11 + 13
= 24.
Question 3.
Nick tries to solve 2 × 1. He drew these circles.
Why will his answer be wrong?
Answer:
Equation: 2 × 2 = 4 not 2 × 1 = 2. He tries wrong.
Explanation:
Number of dots in each box = 2.
Number of boxes of dots = 2.
Total dots = Number of dots in each box × Number of boxes of dots
= 2 × 2
= 4.