# Math in Focus Grade 6 Chapter 1 Answer Key Positive Numbers and the Number Line

Go through the Math in Focus Grade 6 Workbook Answer Key Chapter 1 Positive Numbers and the Number Line to finish your assignments.

## Math in Focus Grade 6 Course 1 A Chapter 1 Answer Key Positive Numbers and the Number Line

### Math in Focus Grade 6 Chapter 1 Quick Check Answer Key

Find the factors of each number.

Question 1.
30
30 = 1 x 30, 30 = 2 x 15,
30 = 3 x 10, 30 = 5 x 6

Explanation:
1, 2, 3, 5, 6, 10, 15 and 30 are the factors of number 30.
a number or algebraic expression that divides another number or expression evenly,
with no remainder.

Question 2.
63
1 x 63 = 63, 3 x 21 = 63, 7 x 9 = 63.

Explanation:
1, 3, 7, 9, 21 and 63 are the factors of number 63.
a number or algebraic expression that divides another number or expression evenly,
with no remainder.

Question 3.
56
1 x 56 = 56, 2 x 28 = 56
4 x 14 = 56, 7 x 8 = 56

Explanation:
1, 2, 4, 7, 8, 14, 28 and 56 are the factors of number 56.
a number or algebraic expression that divides another number or expression evenly,
with no remainder.

Question 4.
84
1 x 84 = 84, 2 x 42 = 84, 3 x 28 = 84
4 x 21 = 84, 6 x 14 = 84, 7 x 12 = 84

Explanation:
1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42 and 84 are the factors of number 84.
a number or algebraic expression that divides another number or expression evenly,
with no remainder.

Find the first five multiples of each number.

Question 5.
4
4, 8, 12, 16 and 20

Explanation:
4 x 1 = 4, 4 x 2 = 8, 4 x 3 = 12, 4 x 4  = 16, 4 x 5 = 20
4, 8, 12, 16 and 20 are the first five multiples of number 4.

Question 6.
6
6, 12, 18, 24 and 30

Explanation:
6 x 1 = 6, 6x 2 = 12, 6 x 3 = 18, 6 x 4 = 24, 6 x 5 = 30
6, 12, 18, 24 and 30 are the first five multiples of number 6.

Question 7.
9
9, 18, 27, 36 and 45

Explanation:
9 x 1 = 9, 9 x 2 = 18, 9 x 3 = 27, 9 x 4 = 36,9 x 5 = 45
9, 18, 27, 36 and 45 are the first five multiples of number 9.

Question 8.
13
13, 26, 6, 52, 65

Explanation:
13 x 1 = 13, 13 x 2 = 26, 13 x 3 = 36, 13 x 4 = 52, 13 x 5 = 65
13, 26, 39, 52 and 65 are the first five multiples of number 13.

Complete.

Question 9.
Identify all the prime numbers in the following set of numbers.
2, 5, 13, 21, 23, 39, 47, 51, 53, 57
2, 5, 13, 23, 47, 53.

Explanation:
2, 5, 13, 23, 47, 53 are the prime numbers in the given set.

Simplify.

Question 10.
(40 – 28) + 8 × 7
68

Explanation:
(40-28) + 8 x 7
=12 + 56
=68
(40 – 28) + 8 × 7 = 68.

Question 11.
75 × (45 ÷ 5) – 70