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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 33 · 40 questions
TalentJR

The trick (Count the places): Forget the points and multiply the whole numbers. Count all the digits after the points in the question. Put the point that many places from the right, then check by rounding.

NameDateTime takenScore ___ / 40
  1. 1.9.8 × 1.9 — where does the decimal point go? (a) 186.2 (b) 1.862 (c) 18.62 (d) 0.1862
  2. 2.0.69 × 1.3 — where does the decimal point go? (a) 8.97 (b) 0.897 (c) 0.00897 (d) 0.0897
  3. 3.0.66 × 7 — where does the decimal point go? (a) 0.462 (b) 4.62 (c) 0.0462 (d) 46.2
  4. 4.0.89 × 0.2 — where does the decimal point go? (a) 0.00178 (b) 0.0178 (c) 1.78 (d) 0.178
  5. 5.0.88 × 22 — where does the decimal point go? (a) 19.36 (b) 1.936 (c) 0.1936 (d) 193.6
  6. 6.0.84 × 8 — where does the decimal point go? (a) 6.72 (b) 0.0672 (c) 67.2 (d) 0.672
  7. 7.2.8 × 0.4 — where does the decimal point go? (a) 1.12 (b) 0.0112 (c) 0.112 (d) 11.2
  8. 8.0.89 × 2 — where does the decimal point go? (a) 0.178 (b) 1.78 (c) 0.0178 (d) 17.8
  9. 9.0.26 × 1.2 — where does the decimal point go? (a) 0.312 (b) 0.0312 (c) 0.00312 (d) 3.12
  10. 10.2.4 × 0.9 — where does the decimal point go? (a) 0.216 (b) 2.16 (c) 21.6 (d) 0.0216
  11. 11.4.3 × 11 — where does the decimal point go? (a) 47.3 (b) 4.73 (c) 0.473 (d) 473
  12. 12.7.3 × 7 — where does the decimal point go? (a) 0.511 (b) 511 (c) 5.11 (d) 51.1
  13. 13.3.1 × 9 — where does the decimal point go? (a) 2.79 (b) 0.279 (c) 279 (d) 27.9
  14. 14.6.1 × 4.1 — where does the decimal point go? (a) 250.1 (b) 25.01 (c) 2.501 (d) 0.2501
  15. 15.0.63 × 0.9 — where does the decimal point go? (a) 0.0567 (b) 0.567 (c) 5.67 (d) 0.00567
  16. 16.6.1 × 9 — where does the decimal point go? (a) 5.49 (b) 54.9 (c) 0.549 (d) 549
  17. 17.0.12 × 4.4 — where does the decimal point go? (a) 0.0528 (b) 5.28 (c) 0.00528 (d) 0.528
  18. 18.0.88 × 8 — where does the decimal point go? (a) 0.704 (b) 0.0704 (c) 7.04 (d) 70.4
  19. 19.0.58 × 1.7 — where does the decimal point go? (a) 0.986 (b) 0.00986 (c) 9.86 (d) 0.0986
  20. 20.5.6 × 3.8 — where does the decimal point go? (a) 2.128 (b) 0.2128 (c) 212.8 (d) 21.28
  21. 21.0.47 × 48 — where does the decimal point go? (a) 225.6 (b) 0.2256 (c) 2.256 (d) 22.56
  22. 22.1.4 × 8 — where does the decimal point go? (a) 0.112 (b) 11.2 (c) 112 (d) 1.12
  23. 23.0.25 × 7 — where does the decimal point go? (a) 17.5 (b) 1.75 (c) 0.0175 (d) 0.175
  24. 24.0.43 × 1.1 — where does the decimal point go? (a) 0.00473 (b) 0.0473 (c) 4.73 (d) 0.473
  25. 25.0.39 × 6 — where does the decimal point go? (a) 0.0234 (b) 0.234 (c) 23.4 (d) 2.34
  26. 26.0.99 × 2.1 — where does the decimal point go? (a) 0.02079 (b) 0.2079 (c) 20.79 (d) 2.079
  27. 27.3.6 × 8 — where does the decimal point go? (a) 288 (b) 2.88 (c) 0.288 (d) 28.8
  28. 28.1.9 × 3.7 — where does the decimal point go? (a) 70.3 (b) 7.03 (c) 0.703 (d) 0.0703
  29. 29.1.3 × 24 — where does the decimal point go? (a) 312 (b) 0.312 (c) 3.12 (d) 31.2
  30. 30.0.33 × 0.9 — where does the decimal point go? (a) 0.00297 (b) 2.97 (c) 0.297 (d) 0.0297
  31. 31.3.6 × 0.9 — where does the decimal point go? (a) 0.0324 (b) 32.4 (c) 3.24 (d) 0.324
  32. 32.6.8 × 9 — where does the decimal point go? (a) 61.2 (b) 0.612 (c) 6.12 (d) 612
  33. 33.7.1 × 8 — where does the decimal point go? (a) 568 (b) 0.568 (c) 56.8 (d) 5.68
  34. 34.0.33 × 4.6 — where does the decimal point go? (a) 0.01518 (b) 1.518 (c) 0.1518 (d) 15.18
  35. 35.5.6 × 9 — where does the decimal point go? (a) 5.04 (b) 0.504 (c) 50.4 (d) 504
  36. 36.8.8 × 2 — where does the decimal point go? (a) 176 (b) 0.176 (c) 1.76 (d) 17.6
  37. 37.9.7 × 0.5 — where does the decimal point go? (a) 0.485 (b) 4.85 (c) 0.0485 (d) 48.5
  38. 38.0.83 × 4 — where does the decimal point go? (a) 33.2 (b) 0.0332 (c) 0.332 (d) 3.32
  39. 39.2.4 × 0.3 — where does the decimal point go? (a) 0.072 (b) 0.0072 (c) 0.72 (d) 7.2
  40. 40.1.7 × 9 — where does the decimal point go? (a) 15.3 (b) 153 (c) 1.53 (d) 0.153

Answer key

  1. 18.62
  2. 0.897
  3. 4.62
  4. 0.178
  5. 19.36
  6. 6.72
  7. 1.12
  8. 1.78
  9. 0.312
  10. 2.16
  11. 47.3
  12. 51.1
  13. 27.9
  14. 25.01
  15. 0.567
  16. 54.9
  17. 0.528
  18. 7.04
  19. 0.986
  20. 21.28
  21. 22.56
  22. 11.2
  23. 1.75
  24. 0.473
  25. 2.34
  26. 2.079
  27. 28.8
  28. 7.03
  29. 31.2
  30. 0.297
  31. 3.24
  32. 61.2
  33. 56.8
  34. 1.518
  35. 50.4
  36. 17.6
  37. 4.85
  38. 3.32
  39. 0.72
  40. 15.3

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