Question

Perform the operation. Write your answer in scientific notation

1). 7 x 10^6 - 5.3 x 10^6

2). 3.4 x 10^4 + 7.1 x 10^5

Answer 1

1). 7 x 10^6 - 5.3 x 10^6 = 7.0-5.3 (×10^6)
= 1.7 × 10^6

2). 3.4 x 10^4 + 7.1 x 10^5 = 3.4+71 (×10^4)
= 74.4 × 10^4 = 7.44 × 10^5