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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 459 · 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. 1.1.7 × 41 — where does the decimal point go? (a) 6.97 (b) 69.7 (c) 0.697 (d) 697
  2. 2.0.69 × 7 — where does the decimal point go? (a) 0.483 (b) 48.3 (c) 0.0483 (d) 4.83
  3. 3.0.37 × 1.6 — where does the decimal point go? (a) 5.92 (b) 0.0592 (c) 0.592 (d) 0.00592
  4. 4.0.38 × 0.2 — where does the decimal point go? (a) 0.00076 (b) 0.076 (c) 0.0076 (d) 0.76
  5. 5.0.61 × 0.4 — where does the decimal point go? (a) 2.44 (b) 0.00244 (c) 0.244 (d) 0.0244
  6. 6.0.39 × 26 — where does the decimal point go? (a) 1.014 (b) 0.1014 (c) 10.14 (d) 101.4
  7. 7.0.74 × 0.3 — where does the decimal point go? (a) 0.222 (b) 0.0222 (c) 0.00222 (d) 2.22
  8. 8.7.9 × 0.2 — where does the decimal point go? (a) 15.8 (b) 0.158 (c) 1.58 (d) 0.0158
  9. 9.4.3 × 9 — where does the decimal point go? (a) 0.387 (b) 387 (c) 38.7 (d) 3.87
  10. 10.0.72 × 0.7 — where does the decimal point go? (a) 0.0504 (b) 0.504 (c) 5.04 (d) 0.00504
  11. 11.2.9 × 1.4 — where does the decimal point go? (a) 4.06 (b) 40.6 (c) 0.0406 (d) 0.406
  12. 12.9.6 × 13 — where does the decimal point go? (a) 124.8 (b) 12.48 (c) 1248 (d) 1.248
  13. 13.0.56 × 6 — where does the decimal point go? (a) 3.36 (b) 0.336 (c) 33.6 (d) 0.0336
  14. 14.0.57 × 0.9 — where does the decimal point go? (a) 0.0513 (b) 0.00513 (c) 0.513 (d) 5.13
  15. 15.8.2 × 31 — where does the decimal point go? (a) 2542 (b) 25.42 (c) 2.542 (d) 254.2
  16. 16.0.77 × 0.5 — where does the decimal point go? (a) 0.00385 (b) 0.0385 (c) 3.85 (d) 0.385
  17. 17.0.36 × 0.7 — where does the decimal point go? (a) 0.252 (b) 0.00252 (c) 0.0252 (d) 2.52
  18. 18.0.88 × 3.4 — where does the decimal point go? (a) 2.992 (b) 0.2992 (c) 29.92 (d) 0.02992
  19. 19.0.29 × 46 — where does the decimal point go? (a) 1.334 (b) 13.34 (c) 0.1334 (d) 133.4
  20. 20.6.4 × 33 — where does the decimal point go? (a) 2.112 (b) 2112 (c) 21.12 (d) 211.2
  21. 21.2.1 × 4 — where does the decimal point go? (a) 0.084 (b) 8.4 (c) 0.84 (d) 84
  22. 22.2.9 × 3.7 — where does the decimal point go? (a) 10.73 (b) 0.1073 (c) 107.3 (d) 1.073
  23. 23.0.27 × 38 — where does the decimal point go? (a) 102.6 (b) 0.1026 (c) 1.026 (d) 10.26
  24. 24.0.39 × 11 — where does the decimal point go? (a) 42.9 (b) 0.429 (c) 4.29 (d) 0.0429
  25. 25.2.7 × 5 — where does the decimal point go? (a) 0.135 (b) 135 (c) 13.5 (d) 1.35
  26. 26.6.1 × 0.4 — where does the decimal point go? (a) 0.244 (b) 24.4 (c) 0.0244 (d) 2.44
  27. 27.0.14 × 8 — where does the decimal point go? (a) 11.2 (b) 1.12 (c) 0.0112 (d) 0.112
  28. 28.7.3 × 6 — where does the decimal point go? (a) 0.438 (b) 438 (c) 43.8 (d) 4.38
  29. 29.0.48 × 0.9 — where does the decimal point go? (a) 0.00432 (b) 0.0432 (c) 0.432 (d) 4.32
  30. 30.9.4 × 19 — where does the decimal point go? (a) 17.86 (b) 178.6 (c) 1786 (d) 1.786
  31. 31.0.95 × 3 — where does the decimal point go? (a) 0.0285 (b) 28.5 (c) 0.285 (d) 2.85
  32. 32.0.66 × 27 — where does the decimal point go? (a) 178.2 (b) 1.782 (c) 0.1782 (d) 17.82
  33. 33.0.65 × 7 — where does the decimal point go? (a) 0.0455 (b) 0.455 (c) 45.5 (d) 4.55
  34. 34.0.51 × 4 — where does the decimal point go? (a) 20.4 (b) 2.04 (c) 0.0204 (d) 0.204
  35. 35.0.52 × 23 — where does the decimal point go? (a) 1.196 (b) 11.96 (c) 119.6 (d) 0.1196
  36. 36.9.8 × 38 — where does the decimal point go? (a) 372.4 (b) 3.724 (c) 3724 (d) 37.24
  37. 37.8.6 × 0.3 — where does the decimal point go? (a) 25.8 (b) 2.58 (c) 0.0258 (d) 0.258
  38. 38.0.32 × 37 — where does the decimal point go? (a) 118.4 (b) 1.184 (c) 0.1184 (d) 11.84
  39. 39.5.8 × 4.2 — where does the decimal point go? (a) 24.36 (b) 243.6 (c) 0.2436 (d) 2.436
  40. 40.2.8 × 0.2 — where does the decimal point go? (a) 5.6 (b) 0.0056 (c) 0.056 (d) 0.56

Answer key

  1. 69.7
  2. 4.83
  3. 0.592
  4. 0.076
  5. 0.244
  6. 10.14
  7. 0.222
  8. 1.58
  9. 38.7
  10. 0.504
  11. 4.06
  12. 124.8
  13. 3.36
  14. 0.513
  15. 254.2
  16. 0.385
  17. 0.252
  18. 2.992
  19. 13.34
  20. 211.2
  21. 8.4
  22. 10.73
  23. 10.26
  24. 4.29
  25. 13.5
  26. 2.44
  27. 1.12
  28. 43.8
  29. 0.432
  30. 178.6
  31. 2.85
  32. 17.82
  33. 4.55
  34. 2.04
  35. 11.96
  36. 372.4
  37. 2.58
  38. 11.84
  39. 24.36
  40. 0.56

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