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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 320 · 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. 1.0.87 × 0.2 — where does the decimal point go? (a) 0.0174 (b) 0.174 (c) 1.74 (d) 0.00174
  2. 2.3.7 × 35 — where does the decimal point go? (a) 12.95 (b) 1.295 (c) 129.5 (d) 1295
  3. 3.0.36 × 0.7 — where does the decimal point go? (a) 2.52 (b) 0.252 (c) 0.0252 (d) 0.00252
  4. 4.0.84 × 41 — where does the decimal point go? (a) 34.44 (b) 0.3444 (c) 3.444 (d) 344.4
  5. 5.0.72 × 23 — where does the decimal point go? (a) 16.56 (b) 165.6 (c) 0.1656 (d) 1.656
  6. 6.6.1 × 3.4 — where does the decimal point go? (a) 20.74 (b) 0.2074 (c) 2.074 (d) 207.4
  7. 7.6.3 × 13 — where does the decimal point go? (a) 81.9 (b) 819 (c) 8.19 (d) 0.819
  8. 8.5.8 × 4 — where does the decimal point go? (a) 0.232 (b) 23.2 (c) 232 (d) 2.32
  9. 9.0.32 × 19 — where does the decimal point go? (a) 0.608 (b) 6.08 (c) 0.0608 (d) 60.8
  10. 10.0.38 × 0.3 — where does the decimal point go? (a) 0.114 (b) 0.00114 (c) 0.0114 (d) 1.14
  11. 11.0.14 × 3 — where does the decimal point go? (a) 0.042 (b) 0.0042 (c) 0.42 (d) 4.2
  12. 12.0.19 × 3.4 — where does the decimal point go? (a) 0.646 (b) 0.00646 (c) 6.46 (d) 0.0646
  13. 13.0.71 × 17 — where does the decimal point go? (a) 12.07 (b) 1.207 (c) 0.1207 (d) 120.7
  14. 14.0.87 × 0.4 — where does the decimal point go? (a) 0.0348 (b) 0.348 (c) 0.00348 (d) 3.48
  15. 15.2.3 × 33 — where does the decimal point go? (a) 7.59 (b) 0.759 (c) 75.9 (d) 759
  16. 16.0.44 × 9 — where does the decimal point go? (a) 0.396 (b) 39.6 (c) 3.96 (d) 0.0396
  17. 17.0.96 × 7 — where does the decimal point go? (a) 6.72 (b) 0.0672 (c) 67.2 (d) 0.672
  18. 18.3.4 × 1.8 — where does the decimal point go? (a) 6.12 (b) 0.612 (c) 0.0612 (d) 61.2
  19. 19.0.64 × 0.2 — where does the decimal point go? (a) 0.128 (b) 0.00128 (c) 1.28 (d) 0.0128
  20. 20.4.9 × 5 — where does the decimal point go? (a) 2.45 (b) 0.245 (c) 245 (d) 24.5
  21. 21.9.9 × 45 — where does the decimal point go? (a) 445.5 (b) 4455 (c) 4.455 (d) 44.55
  22. 22.0.81 × 9 — where does the decimal point go? (a) 7.29 (b) 0.0729 (c) 72.9 (d) 0.729
  23. 23.0.41 × 0.7 — where does the decimal point go? (a) 0.00287 (b) 0.287 (c) 2.87 (d) 0.0287
  24. 24.0.55 × 3.7 — where does the decimal point go? (a) 0.2035 (b) 2.035 (c) 20.35 (d) 0.02035
  25. 25.4.9 × 8 — where does the decimal point go? (a) 392 (b) 0.392 (c) 3.92 (d) 39.2
  26. 26.6.4 × 2.3 — where does the decimal point go? (a) 0.1472 (b) 1.472 (c) 14.72 (d) 147.2
  27. 27.0.91 × 46 — where does the decimal point go? (a) 418.6 (b) 4.186 (c) 41.86 (d) 0.4186
  28. 28.0.97 × 15 — where does the decimal point go? (a) 14.55 (b) 145.5 (c) 1.455 (d) 0.1455
  29. 29.0.89 × 0.8 — where does the decimal point go? (a) 7.12 (b) 0.00712 (c) 0.0712 (d) 0.712
  30. 30.0.44 × 1.7 — where does the decimal point go? (a) 0.748 (b) 0.0748 (c) 7.48 (d) 0.00748
  31. 31.6.8 × 0.3 — where does the decimal point go? (a) 0.0204 (b) 2.04 (c) 20.4 (d) 0.204
  32. 32.0.79 × 8 — where does the decimal point go? (a) 0.0632 (b) 0.632 (c) 6.32 (d) 63.2
  33. 33.3.7 × 1.3 — where does the decimal point go? (a) 4.81 (b) 0.481 (c) 48.1 (d) 0.0481
  34. 34.2.4 × 3 — where does the decimal point go? (a) 72 (b) 7.2 (c) 0.72 (d) 0.072
  35. 35.5.2 × 0.6 — where does the decimal point go? (a) 31.2 (b) 0.0312 (c) 0.312 (d) 3.12
  36. 36.1.3 × 4.5 — where does the decimal point go? (a) 0.0585 (b) 0.585 (c) 5.85 (d) 58.5
  37. 37.0.81 × 3.4 — where does the decimal point go? (a) 27.54 (b) 2.754 (c) 0.02754 (d) 0.2754
  38. 38.0.32 × 6 — where does the decimal point go? (a) 0.192 (b) 19.2 (c) 0.0192 (d) 1.92
  39. 39.7.2 × 4.1 — where does the decimal point go? (a) 295.2 (b) 0.2952 (c) 2.952 (d) 29.52
  40. 40.1.8 × 18 — where does the decimal point go? (a) 0.324 (b) 324 (c) 32.4 (d) 3.24

Answer key

  1. 0.174
  2. 129.5
  3. 0.252
  4. 34.44
  5. 16.56
  6. 20.74
  7. 81.9
  8. 23.2
  9. 6.08
  10. 0.114
  11. 0.42
  12. 0.646
  13. 12.07
  14. 0.348
  15. 75.9
  16. 3.96
  17. 6.72
  18. 6.12
  19. 0.128
  20. 24.5
  21. 445.5
  22. 7.29
  23. 0.287
  24. 2.035
  25. 39.2
  26. 14.72
  27. 41.86
  28. 14.55
  29. 0.712
  30. 0.748
  31. 2.04
  32. 6.32
  33. 4.81
  34. 7.2
  35. 3.12
  36. 5.85
  37. 2.754
  38. 1.92
  39. 29.52
  40. 32.4

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