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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 671 · 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. 1.0.84 × 0.3 — where does the decimal point go? (a) 0.00252 (b) 2.52 (c) 0.0252 (d) 0.252
  2. 2.2.7 × 0.9 — where does the decimal point go? (a) 2.43 (b) 0.243 (c) 24.3 (d) 0.0243
  3. 3.7.9 × 3 — where does the decimal point go? (a) 23.7 (b) 0.237 (c) 2.37 (d) 237
  4. 4.3.9 × 0.3 — where does the decimal point go? (a) 0.117 (b) 1.17 (c) 11.7 (d) 0.0117
  5. 5.6.2 × 0.3 — where does the decimal point go? (a) 0.0186 (b) 1.86 (c) 0.186 (d) 18.6
  6. 6.0.28 × 32 — where does the decimal point go? (a) 8.96 (b) 89.6 (c) 0.0896 (d) 0.896
  7. 7.7.6 × 6 — where does the decimal point go? (a) 4.56 (b) 0.456 (c) 456 (d) 45.6
  8. 8.5.8 × 0.4 — where does the decimal point go? (a) 0.232 (b) 23.2 (c) 2.32 (d) 0.0232
  9. 9.0.19 × 37 — where does the decimal point go? (a) 7.03 (b) 0.0703 (c) 0.703 (d) 70.3
  10. 10.1.8 × 22 — where does the decimal point go? (a) 3.96 (b) 39.6 (c) 0.396 (d) 396
  11. 11.0.77 × 7 — where does the decimal point go? (a) 53.9 (b) 5.39 (c) 0.539 (d) 0.0539
  12. 12.1.8 × 41 — where does the decimal point go? (a) 738 (b) 0.738 (c) 73.8 (d) 7.38
  13. 13.2.6 × 21 — where does the decimal point go? (a) 0.546 (b) 546 (c) 54.6 (d) 5.46
  14. 14.0.81 × 0.5 — where does the decimal point go? (a) 0.405 (b) 0.00405 (c) 4.05 (d) 0.0405
  15. 15.0.41 × 4.8 — where does the decimal point go? (a) 19.68 (b) 1.968 (c) 0.1968 (d) 0.01968
  16. 16.0.15 × 47 — where does the decimal point go? (a) 0.705 (b) 0.0705 (c) 70.5 (d) 7.05
  17. 17.6.8 × 47 — where does the decimal point go? (a) 319.6 (b) 3196 (c) 3.196 (d) 31.96
  18. 18.0.62 × 9 — where does the decimal point go? (a) 5.58 (b) 0.558 (c) 0.0558 (d) 55.8
  19. 19.4.2 × 4.4 — where does the decimal point go? (a) 184.8 (b) 0.1848 (c) 1.848 (d) 18.48
  20. 20.5.3 × 3 — where does the decimal point go? (a) 159 (b) 1.59 (c) 15.9 (d) 0.159
  21. 21.8.1 × 33 — where does the decimal point go? (a) 267.3 (b) 2673 (c) 26.73 (d) 2.673
  22. 22.2.1 × 1.2 — where does the decimal point go? (a) 0.252 (b) 25.2 (c) 2.52 (d) 0.0252
  23. 23.0.62 × 8 — where does the decimal point go? (a) 49.6 (b) 0.496 (c) 4.96 (d) 0.0496
  24. 24.2.6 × 7 — where does the decimal point go? (a) 182 (b) 1.82 (c) 18.2 (d) 0.182
  25. 25.2.3 × 17 — where does the decimal point go? (a) 391 (b) 0.391 (c) 39.1 (d) 3.91
  26. 26.7.1 × 4.8 — where does the decimal point go? (a) 340.8 (b) 34.08 (c) 0.3408 (d) 3.408
  27. 27.0.46 × 8 — where does the decimal point go? (a) 36.8 (b) 0.0368 (c) 3.68 (d) 0.368
  28. 28.5.7 × 4 — where does the decimal point go? (a) 228 (b) 2.28 (c) 0.228 (d) 22.8
  29. 29.7.9 × 4 — where does the decimal point go? (a) 31.6 (b) 0.316 (c) 3.16 (d) 316
  30. 30.0.92 × 7 — where does the decimal point go? (a) 64.4 (b) 6.44 (c) 0.0644 (d) 0.644
  31. 31.2.8 × 4.1 — where does the decimal point go? (a) 0.1148 (b) 114.8 (c) 11.48 (d) 1.148
  32. 32.5.5 × 1.3 — where does the decimal point go? (a) 0.715 (b) 7.15 (c) 71.5 (d) 0.0715
  33. 33.0.71 × 0.3 — where does the decimal point go? (a) 0.0213 (b) 0.00213 (c) 2.13 (d) 0.213
  34. 34.5.6 × 32 — where does the decimal point go? (a) 179.2 (b) 1792 (c) 17.92 (d) 1.792
  35. 35.4.7 × 3.1 — where does the decimal point go? (a) 14.57 (b) 0.1457 (c) 145.7 (d) 1.457
  36. 36.2.6 × 49 — where does the decimal point go? (a) 12.74 (b) 127.4 (c) 1.274 (d) 1274
  37. 37.0.36 × 7 — where does the decimal point go? (a) 0.0252 (b) 25.2 (c) 0.252 (d) 2.52
  38. 38.6.2 × 7 — where does the decimal point go? (a) 434 (b) 4.34 (c) 0.434 (d) 43.4
  39. 39.1.2 × 4 — where does the decimal point go? (a) 4.8 (b) 48 (c) 0.048 (d) 0.48
  40. 40.0.58 × 23 — where does the decimal point go? (a) 13.34 (b) 0.1334 (c) 133.4 (d) 1.334

Answer key

  1. 0.252
  2. 2.43
  3. 23.7
  4. 1.17
  5. 1.86
  6. 8.96
  7. 45.6
  8. 2.32
  9. 7.03
  10. 39.6
  11. 5.39
  12. 73.8
  13. 54.6
  14. 0.405
  15. 1.968
  16. 7.05
  17. 319.6
  18. 5.58
  19. 18.48
  20. 15.9
  21. 267.3
  22. 2.52
  23. 4.96
  24. 18.2
  25. 39.1
  26. 34.08
  27. 3.68
  28. 22.8
  29. 31.6
  30. 6.44
  31. 11.48
  32. 7.15
  33. 0.213
  34. 179.2
  35. 14.57
  36. 127.4
  37. 2.52
  38. 43.4
  39. 4.8
  40. 13.34

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