Year 9 Scientific Notation Worksheet — Level 2 — Answers
Answer sheet with worked solutions for the Year 9 indices & scientific notation worksheet.
Success TutoringWorksheetsAnswer sheetYear 9 · Mathematics · Indices & Scientific NotationYear 9 Scientific Notation Worksheet — Level 2 — Answers
Scientific notation is a × 10ⁿ where 1 ≤ a < 10.
1.Write 30 in scientific notation.
Answer: 3 × 101
Move the decimal point 1 places.
2.Write 3,100,000 in scientific notation.
Answer: 3.1 × 106
Move the decimal point 6 places.
3.Write 23 in scientific notation.
Answer: 2.3 × 101
Move the decimal point 1 places.
4.Write 0.67 in scientific notation.
Answer: 6.7 × 10−1
Move the decimal point 1 places.
5.Write 8.1 × 103 as an ordinary number.
Answer: 8,100
6.Write 2 × 101 as an ordinary number.
Answer: 20
7.Write 5 in scientific notation.
Answer: 4.7 × 100
Move the decimal point 0 places.
8.Write 3.1 × 10−1 as an ordinary number.
Answer: 0.31
9.Write 0.42 in scientific notation.
Answer: 4.2 × 10−1
Move the decimal point 1 places.
10.Write 0.73 in scientific notation.
Answer: 7.3 × 10−1
Move the decimal point 1 places.
11.Write 7.2 × 108 as an ordinary number.
Answer: 720,000,000
12.Write 0.000017 in scientific notation.
Answer: 1.7 × 10−5
Move the decimal point 5 places.
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.