We included HMH Into Math Grade 4 Answer Key PDF Module 8 Review to make students experts in learning maths.
HMH Into Math Grade 4 Module 8 Review Answer Key
Vocabulary
Question 1.
Write the correct term for the definition. An example of this term is shown.
__________ are numbers that are easy to compute mentally.
Answer:
compatible numbers are numbers that are easy to compute mentally.
Concepts and Skills
Estimate the product. Choose a method.
Question 2.
46 × 93
__________
Answer:
46 is near to 45
93 is near to 90
So, 45 x 90 = 4,050
Therefore, 46 x 93 approximately equals 4,050.
Question 3.
23 × 17
__________
Answer:
23 is near to 20
17 is near to 20
So, 20 x 20 = 400
Therefore, 23 x 17 approximately equals 400.
Question 4.
34 × 18
__________
Answer:
34 is near to 35
18 is near to 20
So, 35 x 20 = 700
Therefore, 34 x 18 approximately equals 700.
Question 5.
89 × 91
__________
Answer:
89 is near to 90
91 is near to 90
So, 90 x 90 = 8100
Therefore, 89 x 91 approximately equals 8100.
Use Tools Find the product. Name the strategy or tool you will use to solve the problem, explain your choice, and then find the answer.
Question 6.
19 × 60 = ___
Answer:
Estimation of product.
19 is near to 20
So, 20 x 60 = 1200
Therefore, 1200 – 60 = 1140.
Question 7.
34 × 60 = ____
Answer:
Estimation of product.
34 is near to 35
So, 35 x 60 = 2100
Therefore, 2100 – 60 = 2040.
Question 8.
62 × 30 = ____
Answer:
62 is near to 60
So, 60 x 30 = 1800
Therefore, 1800 + 30 + 30 = 1860.
Question 9.
77 × 40 = ____
Answer:
77 is near to 80
So, 80 x 40 = 3200
Therefore, 3200 – 40 – 40 – 40 = 3080.
Estimate. Then choose a method to find the product.
Question 10.
Estimate: ______
Answer:
Estimation of product by rounding the numbers to their nearest integers.
32 is near to 30
47 is near to 50
So, 30 x 50 = 1500
Therefore, 32 x 47 approximately equals 1500.
Question 11.
Estimate: ______
Answer:
Estimation of product by rounding the numbers to their nearest integers.
76 is near to 80
29 is near to 30
So, 80 x 30 = 2400
Therefore, 76 x 29 approximately equals 2400.
Question 12.
Which unknown digits complete the problem?
A. 4, 6
B. 2, 8
C. 4, 8
D. 6, 2
Answer:
C. 4, 8
Question 13.
Vito is training for a race. He runs 14 miles a day for 16 days. Then he runs 10 miles a day for 3 days. How many fewer miles does he run in the 3 days than the 16 days? _________
Answer:
Given,
Vito is training for a race.
He runs 14 miles a day for 16 days.
Then he runs 10 miles a day for 3 days.
Total miles he ran during 16 days = 14 x 16 = 224
Total miles he ran during 3 days = 10 x 3 = 30
Difference = 224 – 30 – 194
Therefore, he ran 194 miles less in 3 days than 16 days.
Question 14.
Draw an area model to represent the product. Then record the product.
21 × 37 = ___
Answer:
