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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 363 · 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. 1.2.3 × 0.9 — where does the decimal point go? (a) 2.07 (b) 0.207 (c) 20.7 (d) 0.0207
  2. 2.0.14 × 2 — where does the decimal point go? (a) 0.28 (b) 0.0028 (c) 2.8 (d) 0.028
  3. 3.9.9 × 42 — where does the decimal point go? (a) 4.158 (b) 415.8 (c) 4158 (d) 41.58
  4. 4.5.2 × 7 — where does the decimal point go? (a) 0.364 (b) 3.64 (c) 364 (d) 36.4
  5. 5.5.5 × 0.9 — where does the decimal point go? (a) 0.495 (b) 0.0495 (c) 4.95 (d) 49.5
  6. 6.4.1 × 32 — where does the decimal point go? (a) 13.12 (b) 131.2 (c) 1312 (d) 1.312
  7. 7.9.1 × 0.7 — where does the decimal point go? (a) 0.637 (b) 0.0637 (c) 63.7 (d) 6.37
  8. 8.0.21 × 4 — where does the decimal point go? (a) 8.4 (b) 0.0084 (c) 0.084 (d) 0.84
  9. 9.7.6 × 0.8 — where does the decimal point go? (a) 6.08 (b) 0.608 (c) 60.8 (d) 0.0608
  10. 10.0.36 × 0.6 — where does the decimal point go? (a) 2.16 (b) 0.0216 (c) 0.216 (d) 0.00216
  11. 11.0.18 × 2 — where does the decimal point go? (a) 0.0036 (b) 3.6 (c) 0.036 (d) 0.36
  12. 12.1.4 × 7 — where does the decimal point go? (a) 9.8 (b) 0.98 (c) 0.098 (d) 98
  13. 13.0.23 × 12 — where does the decimal point go? (a) 2.76 (b) 0.0276 (c) 27.6 (d) 0.276
  14. 14.3.3 × 4 — where does the decimal point go? (a) 0.132 (b) 132 (c) 13.2 (d) 1.32
  15. 15.0.39 × 0.7 — where does the decimal point go? (a) 0.0273 (b) 2.73 (c) 0.00273 (d) 0.273
  16. 16.4.6 × 6 — where does the decimal point go? (a) 276 (b) 27.6 (c) 2.76 (d) 0.276
  17. 17.0.28 × 0.8 — where does the decimal point go? (a) 0.224 (b) 0.00224 (c) 2.24 (d) 0.0224
  18. 18.7.6 × 0.2 — where does the decimal point go? (a) 0.152 (b) 15.2 (c) 0.0152 (d) 1.52
  19. 19.8.6 × 3 — where does the decimal point go? (a) 2.58 (b) 0.258 (c) 25.8 (d) 258
  20. 20.5.9 × 5 — where does the decimal point go? (a) 2.95 (b) 29.5 (c) 295 (d) 0.295
  21. 21.8.1 × 9 — where does the decimal point go? (a) 729 (b) 72.9 (c) 7.29 (d) 0.729
  22. 22.0.24 × 0.2 — where does the decimal point go? (a) 0.0048 (b) 0.00048 (c) 0.48 (d) 0.048
  23. 23.0.61 × 2.3 — where does the decimal point go? (a) 1.403 (b) 0.01403 (c) 0.1403 (d) 14.03
  24. 24.0.22 × 8 — where does the decimal point go? (a) 0.0176 (b) 17.6 (c) 0.176 (d) 1.76
  25. 25.2.8 × 4 — where does the decimal point go? (a) 11.2 (b) 112 (c) 0.112 (d) 1.12
  26. 26.0.92 × 0.3 — where does the decimal point go? (a) 0.00276 (b) 0.0276 (c) 0.276 (d) 2.76
  27. 27.6.3 × 8 — where does the decimal point go? (a) 50.4 (b) 5.04 (c) 0.504 (d) 504
  28. 28.0.34 × 0.4 — where does the decimal point go? (a) 1.36 (b) 0.0136 (c) 0.00136 (d) 0.136
  29. 29.5.1 × 3 — where does the decimal point go? (a) 1.53 (b) 15.3 (c) 0.153 (d) 153
  30. 30.1.8 × 7 — where does the decimal point go? (a) 0.126 (b) 12.6 (c) 1.26 (d) 126
  31. 31.5.8 × 7 — where does the decimal point go? (a) 40.6 (b) 0.406 (c) 4.06 (d) 406
  32. 32.0.83 × 4.6 — where does the decimal point go? (a) 0.03818 (b) 38.18 (c) 3.818 (d) 0.3818
  33. 33.7.4 × 12 — where does the decimal point go? (a) 8.88 (b) 88.8 (c) 0.888 (d) 888
  34. 34.2.5 × 0.3 — where does the decimal point go? (a) 7.5 (b) 0.0075 (c) 0.75 (d) 0.075
  35. 35.7.7 × 0.7 — where does the decimal point go? (a) 53.9 (b) 0.0539 (c) 5.39 (d) 0.539
  36. 36.9.5 × 0.7 — where does the decimal point go? (a) 0.0665 (b) 66.5 (c) 6.65 (d) 0.665
  37. 37.1.2 × 0.8 — where does the decimal point go? (a) 0.0096 (b) 9.6 (c) 0.096 (d) 0.96
  38. 38.5.6 × 12 — where does the decimal point go? (a) 6.72 (b) 67.2 (c) 0.672 (d) 672
  39. 39.0.15 × 3.1 — where does the decimal point go? (a) 4.65 (b) 0.465 (c) 0.00465 (d) 0.0465
  40. 40.6.8 × 6 — where does the decimal point go? (a) 4.08 (b) 408 (c) 0.408 (d) 40.8

Answer key

  1. 2.07
  2. 0.28
  3. 415.8
  4. 36.4
  5. 4.95
  6. 131.2
  7. 6.37
  8. 0.84
  9. 6.08
  10. 0.216
  11. 0.36
  12. 9.8
  13. 2.76
  14. 13.2
  15. 0.273
  16. 27.6
  17. 0.224
  18. 1.52
  19. 25.8
  20. 29.5
  21. 72.9
  22. 0.048
  23. 1.403
  24. 1.76
  25. 11.2
  26. 0.276
  27. 50.4
  28. 0.136
  29. 15.3
  30. 12.6
  31. 40.6
  32. 3.818
  33. 88.8
  34. 0.75
  35. 5.39
  36. 6.65
  37. 0.96
  38. 67.2
  39. 0.465
  40. 40.8

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