Go through the Math in Focus Grade 8 Workbook Answer Key Chapter 1 Exponents to finish your assignments.

## Math in Focus Grade 8 Course 3 A Chapter 1 Answer Key Exponents

### Math in Focus Grade 8 Chapter 1 Quick Check Answer Key

**Identify the integers in the list below.**

Question 1.

4.31, -6, 8.12, 58, -211,43

Answer:

-211,-6,43 and 58,

Explanation:

Integers are positive,negative and zero but not decimal numbers therefore

from the given numbers 4.31 and 8.12 are not integers

the integers are -211,-6,43 and 58.

**Write each rational number as a terminating decimal.**

Question 2.

\(\frac{3}{5}\)

Answer:

0.6,

Explanation:

when we divide 3 by 5 we get terminating decimal as 0.6.

Question 3.

4\(\frac{1}{4}\)

Answer:

4.25,

Explanation:

Given 4\(\frac{1}{4}\) we get \(\frac{4 x 4 + 1}{4}\) =

\(\frac{17}{4}\)

the terminating decimal is 4.25.

**Write each rational number as a repeating decimal.**

Question 4.

\(\frac{6}{11}\)

Answer:

The repeating decimal of 6/11 is 0.5363636 and so on,

Explanation:

Given to find \(\frac{6}{11}\) we get

the repeating decimal of 6/11 is 0.5363636 and so on.

Question 5.

\(\frac{5}{12}\)

Answer:

The repeating decimal of 5/12 is 0.4166 so on,

Explanation:

The repeating decimal of 5/12 is 0.4166 so on.

**Locate each irrational number on a number line using rational approximation.**

Question 6.

Answer:

Explanation:

Located irrational number cube root of -47 on the

number line – 3.6 using rational approximation.

Question 7.

\(\sqrt{19}\)

Answer:

Explanation:

Located irrational number square root of 19 on the

number line 4.35 using rational approximation.

**Evaluate each expression.**

Question 8.

-3 + (-4)

Answer:

-7,

Explanation:

Adding -3 to -4 we get -7.

Question 4.

-4 – (-2)

Answer:

-6,

Explanation:

Adding -4 to -2 we get -6.

**Evaluate each expression.**

Question 10.

(-7) • (-3)

Answer:

21,

Explanation:

Given -7 multiplied by -3 we get – 7 X -3 = 21.

Question 11.

(-12) ÷ 3

Answer:

-4,

Explanation:

Given to divide (-12) with 3 we get -4.