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

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Complete the pattern by using addition or subtraction.

Question 1.
30Â  Â  Â  26Â  Â  Â  Â  22Â  Â  Â
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

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
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
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
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
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 _____________.
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 _____________.
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 _____________.
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 _____________.
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 _____________.
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 _____________.
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 _____________.
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
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 = ___________
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 = ____________
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
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 + ____________
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 + ___________
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— ___________
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— ___________
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 = ___________
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 = ___________
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 = ____________
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
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 = ___________
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 = ____________
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)
____________ + ____________ = ____________
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)
____________ + ____________ = ____________
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)
____________ + _____________ = ______________