8th Grade Laws of Exponents Worksheet — Level 3 — Practice Set 3 — Answers
Answer sheet with worked solutions for the 8th Grade exponents & scientific notation worksheet.
Success TutoringWorksheetsAnswer sheet8th Grade · Mathematics · Indices & Scientific Notation8th Grade Laws of Exponents Worksheet — Level 3 — Practice Set 3 — Answers
Use the laws of exponents. Write answers with positive exponents.
Answer: 20x10
5 × 4 = 20; add the exponents: 10
Answer: 8x12
4 × 2 = 8; add the exponents: 12
Answer:
A negative index means the reciprocal: 1 ÷ 21 = 1 ÷ 2
Answer: 1
Anything (except 0) to the power of 0 equals 1.
Answer:
A negative index means the reciprocal: 1 ÷ 31 = 1 ÷ 3
Answer: 12x11
3 × 4 = 12; add the exponents: 11
Answer: 25x9
5 × 5 = 25; add the exponents: 9
Answer: 25x12
5 × 5 = 25; add the exponents: 12
Answer: x72
Multiply the exponents: 8 × 9 = 72
Answer: 1
Anything (except 0) to the power of 0 equals 1.
Answer: 1
Anything (except 0) to the power of 0 equals 1.
Answer: x18
Multiply the exponents: 9 × 2 = 18
Answer: 1
Anything (except 0) to the power of 0 equals 1.
Answer: 20x10
5 × 4 = 20; add the exponents: 10
Marking tips
- Give credit for correct method even when the final answer slips — the working shows where the thinking went right.
- For open-ended tasks, use the success criteria as a checklist rather than looking for one "right" answer.
- Celebrate what went well first, then pick one thing to work on next.
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