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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 594 · 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. 1.5.7 × 8 — where does the decimal point go? (a) 456 (b) 45.6 (c) 4.56 (d) 0.456
  2. 2.5.6 × 0.7 — where does the decimal point go? (a) 39.2 (b) 3.92 (c) 0.0392 (d) 0.392
  3. 3.0.79 × 41 — where does the decimal point go? (a) 3.239 (b) 323.9 (c) 0.3239 (d) 32.39
  4. 4.9.9 × 3 — where does the decimal point go? (a) 0.297 (b) 2.97 (c) 29.7 (d) 297
  5. 5.0.12 × 8 — where does the decimal point go? (a) 0.0096 (b) 0.96 (c) 0.096 (d) 9.6
  6. 6.2.9 × 0.4 — where does the decimal point go? (a) 1.16 (b) 0.116 (c) 11.6 (d) 0.0116
  7. 7.7.4 × 13 — where does the decimal point go? (a) 96.2 (b) 9.62 (c) 0.962 (d) 962
  8. 8.7.6 × 4.1 — where does the decimal point go? (a) 0.3116 (b) 3.116 (c) 31.16 (d) 311.6
  9. 9.2.9 × 6 — where does the decimal point go? (a) 0.174 (b) 17.4 (c) 1.74 (d) 174
  10. 10.6.1 × 7 — where does the decimal point go? (a) 4.27 (b) 0.427 (c) 42.7 (d) 427
  11. 11.2.9 × 3.7 — where does the decimal point go? (a) 1.073 (b) 10.73 (c) 107.3 (d) 0.1073
  12. 12.9.8 × 31 — where does the decimal point go? (a) 30.38 (b) 3038 (c) 303.8 (d) 3.038
  13. 13.4.6 × 7 — where does the decimal point go? (a) 322 (b) 0.322 (c) 3.22 (d) 32.2
  14. 14.8.2 × 43 — where does the decimal point go? (a) 3.526 (b) 352.6 (c) 3526 (d) 35.26
  15. 15.0.98 × 0.3 — where does the decimal point go? (a) 0.0294 (b) 2.94 (c) 0.00294 (d) 0.294
  16. 16.9.6 × 3.3 — where does the decimal point go? (a) 31.68 (b) 0.3168 (c) 316.8 (d) 3.168
  17. 17.4.7 × 9 — where does the decimal point go? (a) 4.23 (b) 42.3 (c) 423 (d) 0.423
  18. 18.0.62 × 1.7 — where does the decimal point go? (a) 10.54 (b) 0.01054 (c) 1.054 (d) 0.1054
  19. 19.0.75 × 9 — where does the decimal point go? (a) 0.675 (b) 0.0675 (c) 67.5 (d) 6.75
  20. 20.0.77 × 19 — where does the decimal point go? (a) 146.3 (b) 0.1463 (c) 1.463 (d) 14.63
  21. 21.0.93 × 47 — where does the decimal point go? (a) 43.71 (b) 4.371 (c) 437.1 (d) 0.4371
  22. 22.5.3 × 22 — where does the decimal point go? (a) 11.66 (b) 1.166 (c) 116.6 (d) 1166
  23. 23.6.7 × 4.5 — where does the decimal point go? (a) 301.5 (b) 3.015 (c) 30.15 (d) 0.3015
  24. 24.0.19 × 9 — where does the decimal point go? (a) 17.1 (b) 0.0171 (c) 0.171 (d) 1.71
  25. 25.7.9 × 5 — where does the decimal point go? (a) 395 (b) 39.5 (c) 0.395 (d) 3.95
  26. 26.1.3 × 46 — where does the decimal point go? (a) 59.8 (b) 5.98 (c) 598 (d) 0.598
  27. 27.9.6 × 0.7 — where does the decimal point go? (a) 0.672 (b) 0.0672 (c) 67.2 (d) 6.72
  28. 28.0.28 × 1.7 — where does the decimal point go? (a) 0.476 (b) 0.00476 (c) 4.76 (d) 0.0476
  29. 29.0.55 × 15 — where does the decimal point go? (a) 82.5 (b) 8.25 (c) 0.0825 (d) 0.825
  30. 30.0.17 × 0.7 — where does the decimal point go? (a) 0.0119 (b) 0.119 (c) 0.00119 (d) 1.19
  31. 31.0.44 × 0.2 — where does the decimal point go? (a) 0.00088 (b) 0.88 (c) 0.088 (d) 0.0088
  32. 32.0.17 × 7 — where does the decimal point go? (a) 1.19 (b) 0.0119 (c) 11.9 (d) 0.119
  33. 33.0.21 × 1.1 — where does the decimal point go? (a) 0.231 (b) 0.0231 (c) 0.00231 (d) 2.31
  34. 34.2.4 × 0.4 — where does the decimal point go? (a) 0.0096 (b) 0.96 (c) 0.096 (d) 9.6
  35. 35.0.94 × 4 — where does the decimal point go? (a) 0.376 (b) 3.76 (c) 0.0376 (d) 37.6
  36. 36.6.4 × 2 — where does the decimal point go? (a) 1.28 (b) 0.128 (c) 12.8 (d) 128
  37. 37.0.26 × 18 — where does the decimal point go? (a) 0.0468 (b) 4.68 (c) 46.8 (d) 0.468
  38. 38.0.83 × 3 — where does the decimal point go? (a) 2.49 (b) 24.9 (c) 0.249 (d) 0.0249
  39. 39.8.6 × 0.2 — where does the decimal point go? (a) 17.2 (b) 0.0172 (c) 0.172 (d) 1.72
  40. 40.7.8 × 41 — where does the decimal point go? (a) 3.198 (b) 31.98 (c) 3198 (d) 319.8

Answer key

  1. 45.6
  2. 3.92
  3. 32.39
  4. 29.7
  5. 0.96
  6. 1.16
  7. 96.2
  8. 31.16
  9. 17.4
  10. 42.7
  11. 10.73
  12. 303.8
  13. 32.2
  14. 352.6
  15. 0.294
  16. 31.68
  17. 42.3
  18. 1.054
  19. 6.75
  20. 14.63
  21. 43.71
  22. 116.6
  23. 30.15
  24. 1.71
  25. 39.5
  26. 59.8
  27. 6.72
  28. 0.476
  29. 8.25
  30. 0.119
  31. 0.088
  32. 1.19
  33. 0.231
  34. 0.96
  35. 3.76
  36. 12.8
  37. 4.68
  38. 2.49
  39. 1.72
  40. 319.8

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