10
AssignmentMultiple Select

Scientific Notation and Significant Figures

Question 10 • CR SS Chemistry S2 2018/19 2026

What rules should you follow when multiplying and dividing? Check all that apply.

Answer
A
The exponents in scientific notation should be added when multiplying, and subtracted when dividing.
B
The exponents need to be the same so the leading numbers can be multiplied or divided.
C
The result has the same number of decimal places as the least precise number.
D
The result has the same number of significant figures as the number with the fewest significant figures.

Explanation

When multiplying numbers in scientific notation, multiply the leading numbers and add the powers of 10; when dividing, divide the leading numbers and subtract the powers. For significant figures, the result has as many significant figures as the input with the fewest. Decimal-place matching applies to addition and subtraction, not multiplication or division.

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