G8

Copyright © Swun MathCopyright © Swun Math Grade 8 Unit 3 Lesson 3 C TE

Answer Key

Homework

1. 1.389 × 10^4 + 3.56 × 10^4
   (1.389 + 3.56) × 10^4
   Answer: 4.949 × 10^4

2. 9.61 × 10-^3 – 4.68 × 10-^3

(9.61 – 4.68) × 10-3

Answer: 4.93 × 10-3

3. 4.2 × 10-^2 – 2.66 × 10-^2

(4.2 – 2.66) × 10-2

Answer: 1.54 × 10-2

4. 3.56 × 10^5 – 1.6 × 10^5

(3.56 – 1.6) × 10^5

Answer: 1.96 × 10^5

5. 1.53 × 10^3 + 1.379 × 10^3

(1.53 + 1.379) × 10^3

Answer: 2.909 × 10^3

6. 4.65 × 10^2 – 3.65 × 10^2

(4.65 – 3.65) × 10^2

Answer: 10^2