Practice the questions of McGraw Hill Math Grade 4 Answer Key PDF Chapter 4 Test to secure good marks & knowledge in the exams.
McGraw-Hill Math Grade 4 Chapter 4 Test Answer Key
Identify each number as prime or composite.
Question 1.
16 _____
Answer:
16 = composite number.
Explanation:
A prime number is a whole number greater than 1 whose only factors are 1 and itself. A factor is a whole number that can be divided evenly into another number.
A composite number is a positive integer that can be formed by multiplying two smaller positive integers.
16 = 2 × 8 or 4 × 4.
Question 2.
13 _____
Answer:
13 = Prime number because 1 and itself.
Explanation:
Factors of 13:
13 = 1 × 13.
Question 3.
8 _____
Answer:
8 = composite number.
Explanation:
Factors of 8:
2 × 4 = 8.
1 × 8 = 8.
Question 4.
61 _____
Answer:
61 = Prime number because 1 and itself.
Explanation:
Factors of 61:
1 × 61 = 61.
Question 5.
90 _____
Answer:
90 = composite number.
Explanation:
Factors of 90:
1 × 90 = 90.
2 × 45 = 90.
5 × 18 = 90.
6 × 15 = 90.
9 × 10 = 90.
Question 6.
79 _____
Answer:
79 = Prime number because 1 and itself.
Explanation:
Factors of 79:
1 × 79 = 79.
Find all the factor pairs of each number.
Question 7.
7 ____
Answer:
1 × 7 = 7.
Explanation:
Factor pairs of 7:
1 × 7 = 7.
Question 8.
18 ____
Answer:
1 × 18 = 18.
2 × 9 = 18.
3 × 6 = 18.
Explanation:
Factor pairs of 18:
1 × 18 = 18.
2 × 9 = 18.
3 × 6 = 18.
Question 9.
63 _____
Answer:
1 × 63 = 63.
3 × 21 = 63.
7 × 9 = 63.
Explanation:
Factor pairs of 63:
1 × 63 = 63.
3 × 21 = 63.
7 × 9 = 63.
Write “yes” or “no” for each question.
Question 10.
Is 15 a multiple of 2? ____
Answer:
No, 15 is not a multiple of 2.
Explanation:
Multiples of 15:
1 × 15 = 15.
3 × 5 = 15.
Question 11.
Is 75 a multiple of 5? ____
Answer:
Yes, 75 is a multiple of 5.
Explanation:
Multiples of 75:
1 × 75 = 75.
3 × 25 = 75.
5 × 15 = 75.
Question 12.
Is 72 a multiple of 9? ____
Answer:
Yes, 72 is a multiple of 9.
Explanation:
Multiples of 72:
1 × 72 = 72.
2 × 36 = 72.
3 × 24 = 72.
4 × 18 = 72.
6 × 12 = 72.
8 × 9 = 72.
Question 13.
Is 54 a multiple of 5? ____
Answer:
No, 54 is not multiple of 5.
Explanation:
Multiples of 54:
1 × 54 = 54.
2 × 27 = 54.
3 × 18 = 54.
6 × 9 = 54.
Solve. Write the expressions you use and the answers.
Question 14.
Ms. Williams is making a large pot of chili for a party. The recipe calls for 5 times as many beans as peppers. If she uses 2 cups of peppers, how many cups of beans will she need?
Answer:
Number of cups of beans will she needs = 10.
Explanation:
The recipe calls for 5 times as many beans as peppers.
Number of cups of peppers she uses = 2.
Number of cups of beans will she needs = 5 times × Number of cups of peppers she uses
= 5 × 2
= 10.
Question 15.
Jada made a model of an alligator for a science report. The model was 3 feet long. The actual alligator is 4 times as long as the model. How long is the alligator?
Answer:
Number of feet the model = 3.
The actual alligator is 4 times as long as the model.
Number of feet of alligator =