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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 709 · 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. 1.1.8 × 0.6 — where does the decimal point go? (a) 0.108 (b) 1.08 (c) 10.8 (d) 0.0108
  2. 2.4.4 × 0.9 — where does the decimal point go? (a) 0.0396 (b) 0.396 (c) 39.6 (d) 3.96
  3. 3.0.43 × 3 — where does the decimal point go? (a) 0.0129 (b) 1.29 (c) 0.129 (d) 12.9
  4. 4.2.1 × 0.9 — where does the decimal point go? (a) 1.89 (b) 0.189 (c) 18.9 (d) 0.0189
  5. 5.6.2 × 29 — where does the decimal point go? (a) 17.98 (b) 179.8 (c) 1798 (d) 1.798
  6. 6.3.9 × 0.4 — where does the decimal point go? (a) 0.156 (b) 15.6 (c) 0.0156 (d) 1.56
  7. 7.0.57 × 3 — where does the decimal point go? (a) 17.1 (b) 0.171 (c) 0.0171 (d) 1.71
  8. 8.0.25 × 0.5 — where does the decimal point go? (a) 1.25 (b) 0.0125 (c) 0.125 (d) 0.00125
  9. 9.0.23 × 0.4 — where does the decimal point go? (a) 0.00092 (b) 0.0092 (c) 0.92 (d) 0.092
  10. 10.0.64 × 4.3 — where does the decimal point go? (a) 0.2752 (b) 0.02752 (c) 27.52 (d) 2.752
  11. 11.0.66 × 46 — where does the decimal point go? (a) 30.36 (b) 3.036 (c) 303.6 (d) 0.3036
  12. 12.0.44 × 28 — where does the decimal point go? (a) 123.2 (b) 0.1232 (c) 12.32 (d) 1.232
  13. 13.0.97 × 0.6 — where does the decimal point go? (a) 5.82 (b) 0.00582 (c) 0.0582 (d) 0.582
  14. 14.3.6 × 3 — where does the decimal point go? (a) 1.08 (b) 108 (c) 0.108 (d) 10.8
  15. 15.0.22 × 2 — where does the decimal point go? (a) 4.4 (b) 0.0044 (c) 0.044 (d) 0.44
  16. 16.0.12 × 1.8 — where does the decimal point go? (a) 0.216 (b) 2.16 (c) 0.0216 (d) 0.00216
  17. 17.0.61 × 4.5 — where does the decimal point go? (a) 0.02745 (b) 0.2745 (c) 2.745 (d) 27.45
  18. 18.0.84 × 3.8 — where does the decimal point go? (a) 0.3192 (b) 3.192 (c) 31.92 (d) 0.03192
  19. 19.0.72 × 0.9 — where does the decimal point go? (a) 0.00648 (b) 0.648 (c) 6.48 (d) 0.0648
  20. 20.2.7 × 8 — where does the decimal point go? (a) 21.6 (b) 216 (c) 0.216 (d) 2.16
  21. 21.0.36 × 2.8 — where does the decimal point go? (a) 0.1008 (b) 0.01008 (c) 10.08 (d) 1.008
  22. 22.0.32 × 36 — where does the decimal point go? (a) 11.52 (b) 0.1152 (c) 115.2 (d) 1.152
  23. 23.0.43 × 6 — where does the decimal point go? (a) 2.58 (b) 0.258 (c) 0.0258 (d) 25.8
  24. 24.0.51 × 4 — where does the decimal point go? (a) 20.4 (b) 2.04 (c) 0.204 (d) 0.0204
  25. 25.0.36 × 22 — where does the decimal point go? (a) 79.2 (b) 0.792 (c) 0.0792 (d) 7.92
  26. 26.7.6 × 7 — where does the decimal point go? (a) 532 (b) 5.32 (c) 53.2 (d) 0.532
  27. 27.0.77 × 23 — where does the decimal point go? (a) 1.771 (b) 0.1771 (c) 17.71 (d) 177.1
  28. 28.5.3 × 0.6 — where does the decimal point go? (a) 0.0318 (b) 31.8 (c) 3.18 (d) 0.318
  29. 29.0.31 × 1.4 — where does the decimal point go? (a) 0.434 (b) 0.0434 (c) 4.34 (d) 0.00434
  30. 30.2.1 × 18 — where does the decimal point go? (a) 37.8 (b) 378 (c) 3.78 (d) 0.378
  31. 31.0.84 × 0.3 — where does the decimal point go? (a) 2.52 (b) 0.00252 (c) 0.0252 (d) 0.252
  32. 32.0.53 × 7 — where does the decimal point go? (a) 37.1 (b) 0.0371 (c) 3.71 (d) 0.371
  33. 33.0.65 × 3.7 — where does the decimal point go? (a) 0.02405 (b) 0.2405 (c) 2.405 (d) 24.05
  34. 34.0.62 × 23 — where does the decimal point go? (a) 14.26 (b) 0.1426 (c) 142.6 (d) 1.426
  35. 35.2.1 × 5 — where does the decimal point go? (a) 0.105 (b) 1.05 (c) 105 (d) 10.5
  36. 36.1.7 × 1.6 — where does the decimal point go? (a) 27.2 (b) 2.72 (c) 0.0272 (d) 0.272
  37. 37.0.68 × 2.6 — where does the decimal point go? (a) 1.768 (b) 17.68 (c) 0.1768 (d) 0.01768
  38. 38.8.6 × 0.7 — where does the decimal point go? (a) 60.2 (b) 0.602 (c) 6.02 (d) 0.0602
  39. 39.0.14 × 1.6 — where does the decimal point go? (a) 2.24 (b) 0.00224 (c) 0.0224 (d) 0.224
  40. 40.0.29 × 9 — where does the decimal point go? (a) 26.1 (b) 0.261 (c) 0.0261 (d) 2.61

Answer key

  1. 1.08
  2. 3.96
  3. 1.29
  4. 1.89
  5. 179.8
  6. 1.56
  7. 1.71
  8. 0.125
  9. 0.092
  10. 2.752
  11. 30.36
  12. 12.32
  13. 0.582
  14. 10.8
  15. 0.44
  16. 0.216
  17. 2.745
  18. 3.192
  19. 0.648
  20. 21.6
  21. 1.008
  22. 11.52
  23. 2.58
  24. 2.04
  25. 7.92
  26. 53.2
  27. 17.71
  28. 3.18
  29. 0.434
  30. 37.8
  31. 0.252
  32. 3.71
  33. 2.405
  34. 14.26
  35. 10.5
  36. 2.72
  37. 1.768
  38. 6.02
  39. 0.224
  40. 2.61

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