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Round off the following to one significant figure and simplify

A.9.6 + 5.8 b.817 -19 c.6720 + 24

2 answers

A. 9.6 + 5.8 = 15.4 = 20

B. 817 - 19 = 798 = 800

I'll leave the last one for you.

I am confuse

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