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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 453 · 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. 1.3.3 × 4 — where does the decimal point go? (a) 1.32 (b) 0.132 (c) 13.2 (d) 132
  2. 2.3.6 × 2.1 — where does the decimal point go? (a) 7.56 (b) 0.756 (c) 75.6 (d) 0.0756
  3. 3.2.1 × 3 — where does the decimal point go? (a) 0.63 (b) 63 (c) 6.3 (d) 0.063
  4. 4.3.1 × 7 — where does the decimal point go? (a) 217 (b) 0.217 (c) 21.7 (d) 2.17
  5. 5.0.32 × 8 — where does the decimal point go? (a) 0.0256 (b) 0.256 (c) 2.56 (d) 25.6
  6. 6.6.3 × 0.5 — where does the decimal point go? (a) 3.15 (b) 0.315 (c) 0.0315 (d) 31.5
  7. 7.0.19 × 2.7 — where does the decimal point go? (a) 0.513 (b) 0.0513 (c) 5.13 (d) 0.00513
  8. 8.7.3 × 0.3 — where does the decimal point go? (a) 0.219 (b) 2.19 (c) 21.9 (d) 0.0219
  9. 9.1.6 × 33 — where does the decimal point go? (a) 528 (b) 0.528 (c) 5.28 (d) 52.8
  10. 10.8.9 × 15 — where does the decimal point go? (a) 133.5 (b) 13.35 (c) 1335 (d) 1.335
  11. 11.6.7 × 33 — where does the decimal point go? (a) 221.1 (b) 22.11 (c) 2.211 (d) 2211
  12. 12.0.12 × 6 — where does the decimal point go? (a) 0.072 (b) 0.0072 (c) 7.2 (d) 0.72
  13. 13.6.9 × 1.7 — where does the decimal point go? (a) 0.1173 (b) 1.173 (c) 11.73 (d) 117.3
  14. 14.5.2 × 41 — where does the decimal point go? (a) 2132 (b) 2.132 (c) 21.32 (d) 213.2
  15. 15.0.79 × 5 — where does the decimal point go? (a) 3.95 (b) 39.5 (c) 0.395 (d) 0.0395
  16. 16.5.2 × 0.8 — where does the decimal point go? (a) 0.0416 (b) 41.6 (c) 4.16 (d) 0.416
  17. 17.6.9 × 37 — where does the decimal point go? (a) 2.553 (b) 2553 (c) 25.53 (d) 255.3
  18. 18.0.87 × 35 — where does the decimal point go? (a) 304.5 (b) 30.45 (c) 0.3045 (d) 3.045
  19. 19.2.9 × 0.4 — where does the decimal point go? (a) 0.116 (b) 11.6 (c) 1.16 (d) 0.0116
  20. 20.0.26 × 28 — where does the decimal point go? (a) 72.8 (b) 0.728 (c) 7.28 (d) 0.0728
  21. 21.3.6 × 6 — where does the decimal point go? (a) 2.16 (b) 21.6 (c) 0.216 (d) 216
  22. 22.7.3 × 4.7 — where does the decimal point go? (a) 0.3431 (b) 3.431 (c) 343.1 (d) 34.31
  23. 23.1.7 × 4 — where does the decimal point go? (a) 6.8 (b) 68 (c) 0.68 (d) 0.068
  24. 24.5.1 × 36 — where does the decimal point go? (a) 1836 (b) 183.6 (c) 18.36 (d) 1.836
  25. 25.6.8 × 3 — where does the decimal point go? (a) 0.204 (b) 204 (c) 20.4 (d) 2.04
  26. 26.0.12 × 29 — where does the decimal point go? (a) 0.0348 (b) 34.8 (c) 3.48 (d) 0.348
  27. 27.0.69 × 0.8 — where does the decimal point go? (a) 0.00552 (b) 0.0552 (c) 0.552 (d) 5.52
  28. 28.0.69 × 0.4 — where does the decimal point go? (a) 0.276 (b) 0.0276 (c) 2.76 (d) 0.00276
  29. 29.1.4 × 38 — where does the decimal point go? (a) 532 (b) 0.532 (c) 5.32 (d) 53.2
  30. 30.0.14 × 2.3 — where does the decimal point go? (a) 0.0322 (b) 0.00322 (c) 0.322 (d) 3.22
  31. 31.8.9 × 18 — where does the decimal point go? (a) 160.2 (b) 16.02 (c) 1602 (d) 1.602
  32. 32.2.3 × 24 — where does the decimal point go? (a) 55.2 (b) 552 (c) 5.52 (d) 0.552
  33. 33.1.2 × 0.3 — where does the decimal point go? (a) 0.36 (b) 0.0036 (c) 0.036 (d) 3.6
  34. 34.4.9 × 12 — where does the decimal point go? (a) 588 (b) 5.88 (c) 0.588 (d) 58.8
  35. 35.0.12 × 2 — where does the decimal point go? (a) 0.0024 (b) 0.024 (c) 0.24 (d) 2.4
  36. 36.0.12 × 31 — where does the decimal point go? (a) 3.72 (b) 0.0372 (c) 37.2 (d) 0.372
  37. 37.9.3 × 0.2 — where does the decimal point go? (a) 18.6 (b) 0.186 (c) 1.86 (d) 0.0186
  38. 38.7.6 × 41 — where does the decimal point go? (a) 3.116 (b) 31.16 (c) 3116 (d) 311.6
  39. 39.3.3 × 3 — where does the decimal point go? (a) 0.099 (b) 9.9 (c) 99 (d) 0.99
  40. 40.6.3 × 5 — where does the decimal point go? (a) 3.15 (b) 31.5 (c) 0.315 (d) 315

Answer key

  1. 13.2
  2. 7.56
  3. 6.3
  4. 21.7
  5. 2.56
  6. 3.15
  7. 0.513
  8. 2.19
  9. 52.8
  10. 133.5
  11. 221.1
  12. 0.72
  13. 11.73
  14. 213.2
  15. 3.95
  16. 4.16
  17. 255.3
  18. 30.45
  19. 1.16
  20. 7.28
  21. 21.6
  22. 34.31
  23. 6.8
  24. 183.6
  25. 20.4
  26. 3.48
  27. 0.552
  28. 0.276
  29. 53.2
  30. 0.322
  31. 160.2
  32. 55.2
  33. 0.36
  34. 58.8
  35. 0.24
  36. 3.72
  37. 1.86
  38. 311.6
  39. 9.9
  40. 31.5

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