Students can use the **Spectrum Math Grade 3 Answer Key Chapter 10 Pretest** as a quick guide to resolve any of their doubts.

## Spectrum Math Grade 3 Chapter 10 Pretest Answers Key

**Check What You Know**

**Complete the pattern by using addition or subtraction.**

Question 1.

30Â Â Â 26Â Â Â Â 22Â Â Â

Answer:

Generate the pattern 30 26 22 by using the simple addition with the given numbers by Subtracting 4 for the given series up to the number 6 which is as shown below.

Question 2.

1Â Â Â Â Â 2Â Â Â Â 3

Answer:

Generate the pattern 1 2 3 by using the simple addition with the given numbers by adding 1 for the given series up to the number 7 which is as shown below.

Question 3.

5Â Â Â Â 10Â Â Â Â 15Â Â

Answer:

Generate the pattern 5 10 15 by using the simple addition with the given numbers by adding 5 for the given series up to the number 35 which is as shown below.

Question 4.

4Â Â Â Â 8Â Â Â Â 16Â Â Â

Answer:

Generate the pattern 4Â 8 16 by using the simple addition with the given numbers by doubling the given series up to the number 256 which is as shown below.

Question 5.

1Â Â Â Â 3Â Â Â Â Â 5Â Â Â

Answer:

Generate the pattern 1 3 5 by using the simple addition with the given numbers by adding 2 for the given series up to the number 13 which is as shown below.

Question 6.

10Â Â Â 9Â Â Â Â Â 8Â Â Â

Answer:

Generate the pattern 10 9 8 by using the simple Subtraction the given numbers by decreasing 1 for the given series up to the number 4 which is as shown below.

**Write the number sentence. For the missing part, use a box (). Solve each number sentence.**

Question 7.

Thirty-six divided by a number equals six. ______________

The number is _____________.

Answer:

Let the unknown number be x

When 36 is divided by x = 6

36 Ã· xÂ = 6

It implies 36 = 6x

x = 6

Therefore Thirty-Six Divided by a Six Equals Six.

Question 8.

The product of five and four equals what number? _____________

The product of five and four is _____________.

Answer:

Given numbers are 5 and 4

When both are multiplied = 5 x 4

= 20

Therefore , the product of 5 and 4 is 20.

Question 9.

This number divided by three equals seven. _____________

This number is _____________.

Answer:

Let the number be x

Then x Ã· 3 = 7

Then x = 7 x 3

x = 21

Therefore the number is 21 , 21 is divided by three Equals to seven.

Question 10.

This number times four equals twenty-four. _____________

This number is _____________.

Answer:

Let the number be x

x . 4 = 24

It implies x = 24 Ã· 4

x = 6

Therefore , the 6 times four Equals to twenty-four.

Question 11.

Thirty-five divided by five equals what number? _____________

Fourteen divided by 5 is _____________.

Answer:

Given 35 Ã· 5 = ?

Let the unknown number be x

Then x = 35 Ã· 5

It implies x = 7

Therefore , 35 divided by 5 is 7.

Question 12.

The product of nine and this number equals eighteen. _____________

This number is _____________.

Answer:

Let the number be x

Given product of nine and x = 18

9 x = 18

x = 18 Ã· 9

This implies x = 2

Therefore , the product of nine and two is eighteen.

Question 13.

This number divided by three equals six. _____________

This number is _____________.

Answer:

Let the unknown number be x.

Then , x Ã· 3 = 6

x = 6 x 3

x = 18

Therefore , 18 divided by three Equals Six.

**Complete the following.**

Question 14.

a. 3 + _________ = 3

Answer:

Try to implement the Addition identity as shown below

3+ 0 = 3 . When 3 and zero are added , the result is 3.

b. 5 + 0 = ___________

Answer:

Try to implement the Addition identity as shown below

5+ 0 =Â 5. When 5 and zero are added , the result is 5.

c. 7 Ã— 1 = ____________

Answer:

Try to implement the Multiplication identity as shown below

7 x 1 = 7. When 7 and 1 are Multiplied , the result is 7.

d. __________ Ã— 1 = 6

Answer:

Try to implement the Multiplication identity as shown below

6 x 1 = 6. When 6 and 1 are Multiplied , the result is 6.

Question 15.

a. 5 + 4 = 9 or 5 + 4 = 2 + ____________

Answer:

Try to implement the Commutative Addition property as shown below

5 + 4 = 9 or 5 + 4 = 2 + 7.

b. 6 + 9 = 15 or 6 + 9 = 10 + ___________

Answer:

Try to implement the Commutative Addition property as shown below

6 + 9 = 15 or 6 + 9 = 10 + 5.

c. 2 Ã— 9 = 18 or 2 Ã— 9 = 6 Ã— ___________

Answer:

Try to implement the Commutative Multiplication property as shown below

2 Ã— 9 = 18 or 2 Ã— 9 = 6 Ã— 3.

d. 4 Ã— 5 = 20 or 4 Ã— 5 = 10 Ã— ___________

Answer:

Try to implement the Commutative Multiplication property as shown below.

4 Ã— 5 = 20 or 4 Ã— 5 = 10 Ã— 2

**Complete the following.**

Question 16.

a. 3 Ã— 5 Ã— 2 = x

5 Ã— 2 = 10

10 Ã— 3 = ____________

x = ___________

Answer:

Given 3 x 5 x 2 = x

According to the Associative property

5 Ã— 2 = 10

10 Ã— 3 = 30

x = 30

Hence the Resultant value obtained after Simplification is x = 30

b. 4 Ã— 4 Ã— 3 = z

4 Ã— 3 = 12

12 Ã— 4 = ___________

z = ___________

Answer:

Given 4 x 4 x 3 = z

According to the Associative property

4 Ã— 3 = 12

12 Ã— 4 = 48

z = 48

Hence the Resultant value obtained after Simplification is z = 48

c. 5 Ã— 2 Ã— 1 = y

5 Ã— 1 = 5

5 Ã— 2 = ____________

y = ____________

Answer:

Given 5 x 2 x 1 = y

According to the Associative property

5 Ã— 1 = 5

5 Ã— 2 = 10

y = 10

Hence the Resultant value obtained after Simplification is y = 10

Question 17.

a. 7 Ã— 1 Ã— 2 = n

_________ Ã— 1 = 7

7 Ã— __________ = 14

n = 14

Answer:

Given 7 x 1 x 2 = n

According to the Associative property

7 Ã— 1 = 7

7 Ã— 2 = 14

n = 14

Hence the Resultant value obtained after Simplification is n = 14

b. 8 Ã— 2 Ã— 3 = b

2 Ã— 3 = 6

8 Ã— 6 = ___________

b = ___________

Answer:

Given 8 x 2 x 3 = b

According to the Associative property

2 Ã— 3 = 6

8 Ã— 6 = 48

b = 48

Hence the Resultant value obtained after Simplification is b = 48

c. 2 Ã— 4 Ã— 5 = m

__________ Ã— __________ = ___________

__________ Ã— __________ = ___________

m = ____________

Answer:

Given 2 x 4 x 5 = m

According to the Associative property

4 Ã— 5 = 20

20 Ã— 2 = 40

m = 40

Hence the Resultant value obtained after Simplification is m = 40

**Complete the following.**

Question 18.

14 Ã— 2 = (10 Ã— 2) + (__________ Ã— 2)

____________ + ____________ = ____________

Answer:

Given 14 Ã— 2 = (10 Ã— 2) + (___________ Ã— 2)

According to the distributive property

14 Ã— 2 = (10 Ã— 2) + (4 Ã— 2)

20 + 8Â = 28

14 x 2 = 28

Hence the Resultant value obtained after Simplification is 48.

Question 19.

17 Ã— 6 = (10 Ã— 6) + (____________ Ã— 6)

____________ + ____________ = ____________

Answer:

Given 17 Ã— 6 = (10 Ã— 6) + (____________ Ã— 6)

According to the distributive property

17 Ã— 6 = (10 Ã— 6) + ( 7Ã— 6)

60Â + 42Â = 102

17 x 6 = 102

Hence the Resultant value obtained after Simplification is 102.

Question 20.

15 Ã— 7 = (10 Ã— 7) + (___________ Ã— 7)

____________ + _____________ = ______________

Answer:

Given 15 Ã— 7 = (10 Ã— 7) + (____________ Ã— 7)

According to the distributive property

15 Ã— 7 = (10 Ã— 7) + ( 5 Ã— 7)

70 + 35Â = 105

15 x 7 = 105

Hence the Resultant value obtained after Simplification is 105.