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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 347 · 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. 1.0.21 × 0.3 — where does the decimal point go? (a) 0.00063 (b) 0.063 (c) 0.0063 (d) 0.63
  2. 2.0.72 × 3 — where does the decimal point go? (a) 2.16 (b) 21.6 (c) 0.216 (d) 0.0216
  3. 3.1.9 × 33 — where does the decimal point go? (a) 627 (b) 62.7 (c) 0.627 (d) 6.27
  4. 4.4.2 × 0.7 — where does the decimal point go? (a) 29.4 (b) 2.94 (c) 0.0294 (d) 0.294
  5. 5.8.3 × 4.2 — where does the decimal point go? (a) 3.486 (b) 34.86 (c) 0.3486 (d) 348.6
  6. 6.2.7 × 0.5 — where does the decimal point go? (a) 0.135 (b) 13.5 (c) 1.35 (d) 0.0135
  7. 7.3.2 × 42 — where does the decimal point go? (a) 1.344 (b) 13.44 (c) 134.4 (d) 1344
  8. 8.7.1 × 31 — where does the decimal point go? (a) 2.201 (b) 2201 (c) 220.1 (d) 22.01
  9. 9.0.73 × 0.2 — where does the decimal point go? (a) 0.0146 (b) 0.146 (c) 0.00146 (d) 1.46
  10. 10.9.3 × 9 — where does the decimal point go? (a) 837 (b) 0.837 (c) 8.37 (d) 83.7
  11. 11.0.59 × 2.2 — where does the decimal point go? (a) 12.98 (b) 1.298 (c) 0.01298 (d) 0.1298
  12. 12.0.24 × 0.7 — where does the decimal point go? (a) 0.168 (b) 0.0168 (c) 1.68 (d) 0.00168
  13. 13.1.4 × 0.6 — where does the decimal point go? (a) 0.084 (b) 8.4 (c) 0.84 (d) 0.0084
  14. 14.1.5 × 0.5 — where does the decimal point go? (a) 0.0075 (b) 0.075 (c) 0.75 (d) 7.5
  15. 15.0.87 × 0.2 — where does the decimal point go? (a) 0.00174 (b) 1.74 (c) 0.0174 (d) 0.174
  16. 16.4.3 × 39 — where does the decimal point go? (a) 167.7 (b) 1.677 (c) 1677 (d) 16.77
  17. 17.4.3 × 4.3 — where does the decimal point go? (a) 184.9 (b) 18.49 (c) 1.849 (d) 0.1849
  18. 18.0.24 × 7 — where does the decimal point go? (a) 1.68 (b) 16.8 (c) 0.168 (d) 0.0168
  19. 19.0.39 × 3 — where does the decimal point go? (a) 0.0117 (b) 11.7 (c) 1.17 (d) 0.117
  20. 20.3.5 × 9 — where does the decimal point go? (a) 315 (b) 0.315 (c) 31.5 (d) 3.15
  21. 21.0.85 × 9 — where does the decimal point go? (a) 0.0765 (b) 0.765 (c) 76.5 (d) 7.65
  22. 22.0.92 × 3 — where does the decimal point go? (a) 2.76 (b) 27.6 (c) 0.276 (d) 0.0276
  23. 23.9.8 × 3.6 — where does the decimal point go? (a) 352.8 (b) 35.28 (c) 3.528 (d) 0.3528
  24. 24.0.19 × 3 — where does the decimal point go? (a) 0.057 (b) 0.57 (c) 5.7 (d) 0.0057
  25. 25.4.3 × 4 — where does the decimal point go? (a) 17.2 (b) 1.72 (c) 172 (d) 0.172
  26. 26.0.87 × 5 — where does the decimal point go? (a) 4.35 (b) 43.5 (c) 0.0435 (d) 0.435
  27. 27.6.7 × 44 — where does the decimal point go? (a) 2.948 (b) 2948 (c) 29.48 (d) 294.8
  28. 28.0.68 × 1.4 — where does the decimal point go? (a) 0.952 (b) 0.00952 (c) 0.0952 (d) 9.52
  29. 29.0.93 × 0.5 — where does the decimal point go? (a) 4.65 (b) 0.00465 (c) 0.465 (d) 0.0465
  30. 30.0.36 × 7 — where does the decimal point go? (a) 2.52 (b) 0.0252 (c) 25.2 (d) 0.252
  31. 31.4.9 × 0.2 — where does the decimal point go? (a) 0.0098 (b) 0.98 (c) 0.098 (d) 9.8
  32. 32.6.9 × 16 — where does the decimal point go? (a) 11.04 (b) 1104 (c) 110.4 (d) 1.104
  33. 33.0.88 × 2 — where does the decimal point go? (a) 0.176 (b) 0.0176 (c) 17.6 (d) 1.76
  34. 34.3.3 × 6 — where does the decimal point go? (a) 19.8 (b) 0.198 (c) 1.98 (d) 198
  35. 35.5.9 × 9 — where does the decimal point go? (a) 53.1 (b) 0.531 (c) 531 (d) 5.31
  36. 36.2.9 × 4 — where does the decimal point go? (a) 11.6 (b) 0.116 (c) 1.16 (d) 116
  37. 37.0.82 × 0.6 — where does the decimal point go? (a) 0.492 (b) 4.92 (c) 0.00492 (d) 0.0492
  38. 38.7.7 × 0.4 — where does the decimal point go? (a) 0.0308 (b) 3.08 (c) 30.8 (d) 0.308
  39. 39.9.2 × 0.7 — where does the decimal point go? (a) 0.0644 (b) 0.644 (c) 6.44 (d) 64.4
  40. 40.0.38 × 4 — where does the decimal point go? (a) 0.152 (b) 15.2 (c) 1.52 (d) 0.0152

Answer key

  1. 0.063
  2. 2.16
  3. 62.7
  4. 2.94
  5. 34.86
  6. 1.35
  7. 134.4
  8. 220.1
  9. 0.146
  10. 83.7
  11. 1.298
  12. 0.168
  13. 0.84
  14. 0.75
  15. 0.174
  16. 167.7
  17. 18.49
  18. 1.68
  19. 1.17
  20. 31.5
  21. 7.65
  22. 2.76
  23. 35.28
  24. 0.57
  25. 17.2
  26. 4.35
  27. 294.8
  28. 0.952
  29. 0.465
  30. 2.52
  31. 0.98
  32. 110.4
  33. 1.76
  34. 19.8
  35. 53.1
  36. 11.6
  37. 0.492
  38. 3.08
  39. 6.44
  40. 1.52

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