Question

Find (2 × 104) − (3 × 103). A) 1.07 × 103 B) 1.07 × 104 C) 1.7 × 103 D) 1.7 × 104

Answer 1

$2 \times 10^{4} - 3 \times 10^{3} = 2 \times 10^{4} -0.3 \times 10^{4} = (2.0 -0.3) \times 10^{4} = 1.7 \times 10^{4}$

Selection D is appropriate.

Answer 2

2 * 104 = 208

3 * 103 = 309 


208 - 309 = -101

Your answer is -101


Hope I helped!

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~ Zoe