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Scientific Notation and Significant Figures

Question 11 • CR SS Chemistry S2 2018/19 2026

9.0 + 2.000 (35.35) =

Answer
A
80
B
79.7
C
79.70

Explanation

Multiply first: 2.000 × 35.35 = 70.70. Then add 9.0 to get 79.70. Because 9.0 is precise only to the tenths place, round the sum to the tenths place: 79.7, choice B.

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