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Subtract numbers in scientific notation

Year 9 maths · Fieldbook Learning

Name ______________________ Date __________

When the powers of 10 match, add or subtract the numbers in front. Then make sure the front number is between 1 and 10.

  1. Subtract: (7.8 × 10⁷) − (1.4 × 10⁷). Write the answer in scientific notation, like 4.7 × 10^3.
  2. Subtract: (3.9 × 10⁷) − (2.4 × 10⁷). Write the answer in scientific notation, like 4.7 × 10^3.
  3. Subtract: (8.7 × 10⁷) − (2 × 10⁷). Write the answer in scientific notation, like 4.7 × 10^3.
  4. Subtract: (8.2 × 10⁶) − (2.1 × 10⁶). Write the answer in scientific notation, like 4.7 × 10^3.
  5. Subtract: (2.9 × 10⁸) − (2.6 × 10⁸). Write the answer in scientific notation, like 4.7 × 10^3.
  6. Subtract: (4 × 10⁹) − (1.3 × 10⁹). Write the answer in scientific notation, like 4.7 × 10^3.
  7. Subtract: (5.7 × 10⁹) − (1.6 × 10⁹). Write the answer in scientific notation, like 4.7 × 10^3.
  8. Subtract: (7.7 × 10⁹) − (3.9 × 10⁹). Write the answer in scientific notation, like 4.7 × 10^3.
  9. Subtract: (7.32 × 10⁴) − (1.18 × 10⁴). Write the answer in scientific notation, like 4.7 × 10^3.
  10. Subtract: (5.71 × 10⁴) − (4.36 × 10⁴). Write the answer in scientific notation, like 4.7 × 10^3.
  11. Subtract: (8.4 × 10⁴) − (6.4 × 10⁴). Write the answer in scientific notation, like 4.7 × 10^3.
  12. Subtract: (6.4 × 10¹⁰) − (6.04 × 10¹⁰). Write the answer in scientific notation, like 4.7 × 10^3.
  13. Subtract: (4.06 × 10⁹) − (1.99 × 10⁹). Write the answer in scientific notation, like 4.7 × 10^3.
  14. Subtract: (5.77 × 10⁵) − (3.05 × 10⁵). Write the answer in scientific notation, like 4.7 × 10^3.
  15. Subtract: (5.3 × 10³) − (3.21 × 10³). Write the answer in scientific notation, like 4.7 × 10^3.
  16. Subtract: (6.69 × 10²) − (5.78 × 10²). Write the answer in scientific notation, like 4.7 × 10^3.
  17. Subtract: (5.99 × 10¹⁵) − (4.17 × 10¹⁵). Write the answer in scientific notation, like 4.7 × 10^3.
  18. Subtract: (7.09 × 10¹²) − (4.17 × 10¹²). Write the answer in scientific notation, like 4.7 × 10^3.
  19. Subtract: (7.92 × 10⁶) − (7.71 × 10⁶). Write the answer in scientific notation, like 4.7 × 10^3.
  20. Subtract: (7.89 × 10¹²) − (6.59 × 10¹²). Write the answer in scientific notation, like 4.7 × 10^3.
More free practice: fieldbooklearning.com/uk/practice/year-9/subtract-numbers-in-scientific-notation/

Answer key: Subtract numbers in scientific notation

  1. 6.4 × 10^7
  2. 1.5 × 10^7
  3. 6.7 × 10^7
  4. 6.1 × 10^6
  5. 3 × 10^7
  6. 2.7 × 10^9
  7. 4.1 × 10^9
  8. 3.8 × 10^9
  9. 6.14 × 10^4
  10. 1.35 × 10^4
  11. 2 × 10^4
  12. 3.6 × 10^9
  13. 2.07 × 10^9
  14. 2.72 × 10^5
  15. 2.09 × 10^3
  16. 9.1 × 10^1
  17. 1.82 × 10^15
  18. 2.92 × 10^12
  19. 2.1 × 10^5
  20. 1.3 × 10^12