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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 572 · 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. 1.3.6 × 3 — where does the decimal point go? (a) 0.108 (b) 10.8 (c) 108 (d) 1.08
  2. 2.5.5 × 9 — where does the decimal point go? (a) 49.5 (b) 0.495 (c) 495 (d) 4.95
  3. 3.1.6 × 32 — where does the decimal point go? (a) 5.12 (b) 512 (c) 0.512 (d) 51.2
  4. 4.8.6 × 8 — where does the decimal point go? (a) 6.88 (b) 68.8 (c) 0.688 (d) 688
  5. 5.9.4 × 1.9 — where does the decimal point go? (a) 0.1786 (b) 178.6 (c) 17.86 (d) 1.786
  6. 6.0.96 × 0.9 — where does the decimal point go? (a) 8.64 (b) 0.864 (c) 0.00864 (d) 0.0864
  7. 7.4.8 × 4.4 — where does the decimal point go? (a) 211.2 (b) 21.12 (c) 2.112 (d) 0.2112
  8. 8.8.4 × 29 — where does the decimal point go? (a) 243.6 (b) 2.436 (c) 2436 (d) 24.36
  9. 9.7.1 × 0.5 — where does the decimal point go? (a) 3.55 (b) 35.5 (c) 0.355 (d) 0.0355
  10. 10.0.61 × 4.7 — where does the decimal point go? (a) 2.867 (b) 0.2867 (c) 0.02867 (d) 28.67
  11. 11.4.2 × 16 — where does the decimal point go? (a) 672 (b) 6.72 (c) 67.2 (d) 0.672
  12. 12.0.22 × 28 — where does the decimal point go? (a) 0.616 (b) 0.0616 (c) 6.16 (d) 61.6
  13. 13.4.9 × 0.5 — where does the decimal point go? (a) 2.45 (b) 24.5 (c) 0.0245 (d) 0.245
  14. 14.1.8 × 33 — where does the decimal point go? (a) 0.594 (b) 59.4 (c) 594 (d) 5.94
  15. 15.5.1 × 1.6 — where does the decimal point go? (a) 0.816 (b) 8.16 (c) 0.0816 (d) 81.6
  16. 16.2.6 × 48 — where does the decimal point go? (a) 12.48 (b) 124.8 (c) 1.248 (d) 1248
  17. 17.2.2 × 21 — where does the decimal point go? (a) 4.62 (b) 462 (c) 0.462 (d) 46.2
  18. 18.1.5 × 2.1 — where does the decimal point go? (a) 0.315 (b) 3.15 (c) 0.0315 (d) 31.5
  19. 19.0.73 × 4.5 — where does the decimal point go? (a) 32.85 (b) 0.3285 (c) 0.03285 (d) 3.285
  20. 20.0.81 × 3 — where does the decimal point go? (a) 2.43 (b) 0.243 (c) 0.0243 (d) 24.3
  21. 21.0.45 × 0.9 — where does the decimal point go? (a) 0.0405 (b) 0.405 (c) 0.00405 (d) 4.05
  22. 22.0.64 × 2 — where does the decimal point go? (a) 0.128 (b) 1.28 (c) 0.0128 (d) 12.8
  23. 23.0.94 × 22 — where does the decimal point go? (a) 0.2068 (b) 20.68 (c) 2.068 (d) 206.8
  24. 24.9.1 × 26 — where does the decimal point go? (a) 23.66 (b) 236.6 (c) 2.366 (d) 2366
  25. 25.0.42 × 3 — where does the decimal point go? (a) 12.6 (b) 0.0126 (c) 0.126 (d) 1.26
  26. 26.8.7 × 2 — where does the decimal point go? (a) 0.174 (b) 1.74 (c) 174 (d) 17.4
  27. 27.2.9 × 3.6 — where does the decimal point go? (a) 104.4 (b) 0.1044 (c) 1.044 (d) 10.44
  28. 28.0.79 × 9 — where does the decimal point go? (a) 7.11 (b) 0.711 (c) 0.0711 (d) 71.1
  29. 29.7.4 × 6 — where does the decimal point go? (a) 444 (b) 0.444 (c) 44.4 (d) 4.44
  30. 30.4.7 × 9 — where does the decimal point go? (a) 0.423 (b) 4.23 (c) 423 (d) 42.3
  31. 31.0.83 × 1.9 — where does the decimal point go? (a) 1.577 (b) 15.77 (c) 0.1577 (d) 0.01577
  32. 32.5.4 × 6 — where does the decimal point go? (a) 32.4 (b) 0.324 (c) 3.24 (d) 324
  33. 33.0.34 × 2 — where does the decimal point go? (a) 0.0068 (b) 6.8 (c) 0.068 (d) 0.68
  34. 34.3.4 × 0.9 — where does the decimal point go? (a) 0.306 (b) 30.6 (c) 3.06 (d) 0.0306
  35. 35.0.47 × 0.2 — where does the decimal point go? (a) 0.00094 (b) 0.94 (c) 0.0094 (d) 0.094
  36. 36.3.8 × 0.6 — where does the decimal point go? (a) 0.228 (b) 0.0228 (c) 2.28 (d) 22.8
  37. 37.5.7 × 5 — where does the decimal point go? (a) 0.285 (b) 28.5 (c) 2.85 (d) 285
  38. 38.0.14 × 0.2 — where does the decimal point go? (a) 0.0028 (b) 0.00028 (c) 0.28 (d) 0.028
  39. 39.1.4 × 4 — where does the decimal point go? (a) 0.056 (b) 56 (c) 5.6 (d) 0.56
  40. 40.2.1 × 5 — where does the decimal point go? (a) 10.5 (b) 0.105 (c) 105 (d) 1.05

Answer key

  1. 10.8
  2. 49.5
  3. 51.2
  4. 68.8
  5. 17.86
  6. 0.864
  7. 21.12
  8. 243.6
  9. 3.55
  10. 2.867
  11. 67.2
  12. 6.16
  13. 2.45
  14. 59.4
  15. 8.16
  16. 124.8
  17. 46.2
  18. 3.15
  19. 3.285
  20. 2.43
  21. 0.405
  22. 1.28
  23. 20.68
  24. 236.6
  25. 1.26
  26. 17.4
  27. 10.44
  28. 7.11
  29. 44.4
  30. 42.3
  31. 1.577
  32. 32.4
  33. 0.68
  34. 3.06
  35. 0.094
  36. 2.28
  37. 28.5
  38. 0.028
  39. 5.6
  40. 10.5

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