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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 278 · 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. 1.6.7 × 0.5 — where does the decimal point go? (a) 0.0335 (b) 0.335 (c) 33.5 (d) 3.35
  2. 2.8.4 × 1.9 — where does the decimal point go? (a) 1.596 (b) 0.1596 (c) 159.6 (d) 15.96
  3. 3.0.29 × 7 — where does the decimal point go? (a) 2.03 (b) 0.0203 (c) 20.3 (d) 0.203
  4. 4.1.2 × 0.7 — where does the decimal point go? (a) 0.84 (b) 0.0084 (c) 8.4 (d) 0.084
  5. 5.2.2 × 0.7 — where does the decimal point go? (a) 15.4 (b) 1.54 (c) 0.0154 (d) 0.154
  6. 6.0.89 × 3.5 — where does the decimal point go? (a) 3.115 (b) 0.3115 (c) 0.03115 (d) 31.15
  7. 7.2.7 × 41 — where does the decimal point go? (a) 110.7 (b) 11.07 (c) 1.107 (d) 1107
  8. 8.0.73 × 2 — where does the decimal point go? (a) 0.146 (b) 0.0146 (c) 14.6 (d) 1.46
  9. 9.6.3 × 24 — where does the decimal point go? (a) 15.12 (b) 1512 (c) 151.2 (d) 1.512
  10. 10.0.21 × 0.4 — where does the decimal point go? (a) 0.084 (b) 0.0084 (c) 0.84 (d) 0.00084
  11. 11.8.8 × 4 — where does the decimal point go? (a) 0.352 (b) 35.2 (c) 3.52 (d) 352
  12. 12.0.81 × 15 — where does the decimal point go? (a) 1.215 (b) 0.1215 (c) 12.15 (d) 121.5
  13. 13.2.8 × 7 — where does the decimal point go? (a) 19.6 (b) 1.96 (c) 196 (d) 0.196
  14. 14.6.7 × 37 — where does the decimal point go? (a) 2479 (b) 2.479 (c) 24.79 (d) 247.9
  15. 15.0.57 × 3.1 — where does the decimal point go? (a) 17.67 (b) 1.767 (c) 0.1767 (d) 0.01767
  16. 16.7.5 × 0.9 — where does the decimal point go? (a) 0.0675 (b) 0.675 (c) 67.5 (d) 6.75
  17. 17.0.96 × 1.8 — where does the decimal point go? (a) 1.728 (b) 17.28 (c) 0.01728 (d) 0.1728
  18. 18.5.2 × 1.8 — where does the decimal point go? (a) 9.36 (b) 93.6 (c) 0.936 (d) 0.0936
  19. 19.5.1 × 1.3 — where does the decimal point go? (a) 0.663 (b) 6.63 (c) 0.0663 (d) 66.3
  20. 20.0.73 × 26 — where does the decimal point go? (a) 1.898 (b) 189.8 (c) 0.1898 (d) 18.98
  21. 21.0.59 × 0.3 — where does the decimal point go? (a) 1.77 (b) 0.177 (c) 0.00177 (d) 0.0177
  22. 22.1.9 × 18 — where does the decimal point go? (a) 34.2 (b) 0.342 (c) 342 (d) 3.42
  23. 23.0.45 × 3.9 — where does the decimal point go? (a) 0.1755 (b) 0.01755 (c) 17.55 (d) 1.755
  24. 24.3.8 × 3.3 — where does the decimal point go? (a) 1.254 (b) 12.54 (c) 125.4 (d) 0.1254
  25. 25.6.5 × 2.1 — where does the decimal point go? (a) 136.5 (b) 0.1365 (c) 13.65 (d) 1.365
  26. 26.1.2 × 27 — where does the decimal point go? (a) 3.24 (b) 324 (c) 0.324 (d) 32.4
  27. 27.0.55 × 0.3 — where does the decimal point go? (a) 0.165 (b) 0.0165 (c) 0.00165 (d) 1.65
  28. 28.0.76 × 22 — where does the decimal point go? (a) 0.1672 (b) 167.2 (c) 16.72 (d) 1.672
  29. 29.9.7 × 5 — where does the decimal point go? (a) 485 (b) 48.5 (c) 4.85 (d) 0.485
  30. 30.9.9 × 2.3 — where does the decimal point go? (a) 22.77 (b) 227.7 (c) 2.277 (d) 0.2277
  31. 31.0.98 × 0.6 — where does the decimal point go? (a) 0.588 (b) 0.0588 (c) 0.00588 (d) 5.88
  32. 32.0.73 × 3 — where does the decimal point go? (a) 0.219 (b) 0.0219 (c) 21.9 (d) 2.19
  33. 33.0.13 × 0.9 — where does the decimal point go? (a) 0.117 (b) 0.0117 (c) 0.00117 (d) 1.17
  34. 34.4.7 × 4 — where does the decimal point go? (a) 18.8 (b) 0.188 (c) 188 (d) 1.88
  35. 35.6.7 × 6 — where does the decimal point go? (a) 4.02 (b) 0.402 (c) 40.2 (d) 402
  36. 36.1.9 × 3 — where does the decimal point go? (a) 57 (b) 0.057 (c) 5.7 (d) 0.57
  37. 37.2.2 × 0.3 — where does the decimal point go? (a) 0.66 (b) 6.6 (c) 0.066 (d) 0.0066
  38. 38.6.7 × 2 — where does the decimal point go? (a) 134 (b) 0.134 (c) 1.34 (d) 13.4
  39. 39.4.3 × 0.3 — where does the decimal point go? (a) 0.129 (b) 12.9 (c) 0.0129 (d) 1.29
  40. 40.1.9 × 37 — where does the decimal point go? (a) 0.703 (b) 7.03 (c) 703 (d) 70.3

Answer key

  1. 3.35
  2. 15.96
  3. 2.03
  4. 0.84
  5. 1.54
  6. 3.115
  7. 110.7
  8. 1.46
  9. 151.2
  10. 0.084
  11. 35.2
  12. 12.15
  13. 19.6
  14. 247.9
  15. 1.767
  16. 6.75
  17. 1.728
  18. 9.36
  19. 6.63
  20. 18.98
  21. 0.177
  22. 34.2
  23. 1.755
  24. 12.54
  25. 13.65
  26. 32.4
  27. 0.165
  28. 16.72
  29. 48.5
  30. 22.77
  31. 0.588
  32. 2.19
  33. 0.117
  34. 18.8
  35. 40.2
  36. 5.7
  37. 0.66
  38. 13.4
  39. 1.29
  40. 70.3

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