MA.8.NSO.1.5 · Number Sense and Operations and Probability

Operations with Numbers in Scientific Notation: Sample FAST Questions

Computing in scientific notation asks 8th graders to add, subtract, multiply, and divide values like 2.31 × 10^15 and 9.1 × 10^13 and report the result in proper form. Addition and subtraction require matching the exponents first, while multiplication and division use the exponent rules directly.

How the FAST tests this benchmark

This benchmark leans on the equation editor more than almost any other in 8th grade, since students type an exact answer in scientific notation. Two traps: leaving a result like 12.4 × 10^6 unnormalized, and losing the exponent match on a sum.

Skills students need

Add and subtract numbers in scientific notation
Multiply numbers in scientific notation
Divide numbers in scientific notation
Rewrite a result in proper scientific notation

Try 6 real MA.8.NSO.1.5 questions

These come straight from Algebro's 8th grade pre-algebra question bank, easiest first. Answer one, check it, then move to the next.

Question 1 of 6

Answer it and Algebro checks it instantly

Question 1EasyEquation Editor

Find the quotient. Write your answer in scientific notation.

\dfrac{8 \times 10^{9}}{2 \times 10^{4}}

Enter the full expression. If it has a variable, include it.

Showcase extra: the real practice and quiz players do not have this button.

Question 3MediumMatching

Match each expression to its value in scientific notation.

Pick one match in each row, then check.

	$2 \times 10^{11}$	$4 \times 10^{4}$	$5 \times 10^{-7}$	$3 \times 10^{-3}$
$\dfrac{8 \times 10^{6}}{2 \times 10^{2}}$
$\dfrac{6 \times 10^{9}}{3 \times 10^{-2}}$
$\dfrac{9 \times 10^{5}}{3 \times 10^{8}}$
$\dfrac{4 \times 10^{-4}}{8 \times 10^{2}}$

Showcase extra: the real practice and quiz players do not have this button.

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More 8th grade number sense and probability benchmarks

MA.8.NSO.1.6

Real-World Problems with Scientific Notation

MA.8.NSO.1.7

Order of Operations with Exponents and Radicals

MA.8.DP.2.1

Sample Spaces for Repeated Experiments