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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 737 · 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. 1.0.27 × 5 — where does the decimal point go? (a) 0.0135 (b) 13.5 (c) 0.135 (d) 1.35
  2. 2.1.8 × 2.4 — where does the decimal point go? (a) 4.32 (b) 43.2 (c) 0.432 (d) 0.0432
  3. 3.2.1 × 32 — where does the decimal point go? (a) 67.2 (b) 0.672 (c) 6.72 (d) 672
  4. 4.2.2 × 2.6 — where does the decimal point go? (a) 5.72 (b) 0.0572 (c) 0.572 (d) 57.2
  5. 5.8.4 × 1.8 — where does the decimal point go? (a) 151.2 (b) 1.512 (c) 0.1512 (d) 15.12
  6. 6.5.8 × 2 — where does the decimal point go? (a) 0.116 (b) 1.16 (c) 11.6 (d) 116
  7. 7.0.45 × 11 — where does the decimal point go? (a) 4.95 (b) 0.495 (c) 0.0495 (d) 49.5
  8. 8.7.8 × 43 — where does the decimal point go? (a) 335.4 (b) 33.54 (c) 3.354 (d) 3354
  9. 9.3.3 × 0.8 — where does the decimal point go? (a) 26.4 (b) 0.264 (c) 0.0264 (d) 2.64
  10. 10.0.65 × 7 — where does the decimal point go? (a) 4.55 (b) 0.455 (c) 45.5 (d) 0.0455
  11. 11.8.4 × 0.7 — where does the decimal point go? (a) 0.0588 (b) 5.88 (c) 58.8 (d) 0.588
  12. 12.2.4 × 2.1 — where does the decimal point go? (a) 0.504 (b) 5.04 (c) 0.0504 (d) 50.4
  13. 13.0.27 × 8 — where does the decimal point go? (a) 21.6 (b) 0.216 (c) 2.16 (d) 0.0216
  14. 14.3.4 × 19 — where does the decimal point go? (a) 0.646 (b) 6.46 (c) 64.6 (d) 646
  15. 15.3.9 × 1.7 — where does the decimal point go? (a) 6.63 (b) 0.0663 (c) 66.3 (d) 0.663
  16. 16.0.78 × 48 — where does the decimal point go? (a) 37.44 (b) 0.3744 (c) 3.744 (d) 374.4
  17. 17.4.2 × 9 — where does the decimal point go? (a) 3.78 (b) 37.8 (c) 0.378 (d) 378
  18. 18.2.9 × 0.6 — where does the decimal point go? (a) 1.74 (b) 0.0174 (c) 0.174 (d) 17.4
  19. 19.0.12 × 2 — where does the decimal point go? (a) 0.024 (b) 2.4 (c) 0.24 (d) 0.0024
  20. 20.9.4 × 7 — where does the decimal point go? (a) 658 (b) 6.58 (c) 0.658 (d) 65.8
  21. 21.6.6 × 0.2 — where does the decimal point go? (a) 1.32 (b) 13.2 (c) 0.0132 (d) 0.132
  22. 22.5.2 × 9 — where does the decimal point go? (a) 4.68 (b) 46.8 (c) 0.468 (d) 468
  23. 23.0.97 × 15 — where does the decimal point go? (a) 1.455 (b) 14.55 (c) 145.5 (d) 0.1455
  24. 24.0.68 × 2.7 — where does the decimal point go? (a) 18.36 (b) 0.01836 (c) 1.836 (d) 0.1836
  25. 25.0.72 × 4 — where does the decimal point go? (a) 0.0288 (b) 2.88 (c) 0.288 (d) 28.8
  26. 26.0.64 × 1.8 — where does the decimal point go? (a) 0.01152 (b) 0.1152 (c) 11.52 (d) 1.152
  27. 27.5.1 × 4 — where does the decimal point go? (a) 20.4 (b) 204 (c) 0.204 (d) 2.04
  28. 28.8.3 × 46 — where does the decimal point go? (a) 38.18 (b) 381.8 (c) 3.818 (d) 3818
  29. 29.6.2 × 1.8 — where does the decimal point go? (a) 111.6 (b) 11.16 (c) 0.1116 (d) 1.116
  30. 30.5.3 × 0.7 — where does the decimal point go? (a) 0.371 (b) 0.0371 (c) 37.1 (d) 3.71
  31. 31.8.8 × 17 — where does the decimal point go? (a) 149.6 (b) 1.496 (c) 14.96 (d) 1496
  32. 32.0.19 × 3 — where does the decimal point go? (a) 0.057 (b) 0.57 (c) 0.0057 (d) 5.7
  33. 33.8.1 × 44 — where does the decimal point go? (a) 3.564 (b) 356.4 (c) 35.64 (d) 3564
  34. 34.8.8 × 4.6 — where does the decimal point go? (a) 4.048 (b) 404.8 (c) 0.4048 (d) 40.48
  35. 35.0.13 × 0.9 — where does the decimal point go? (a) 1.17 (b) 0.00117 (c) 0.0117 (d) 0.117
  36. 36.0.68 × 6 — where does the decimal point go? (a) 0.408 (b) 4.08 (c) 0.0408 (d) 40.8
  37. 37.0.46 × 7 — where does the decimal point go? (a) 32.2 (b) 0.322 (c) 3.22 (d) 0.0322
  38. 38.0.72 × 1.6 — where does the decimal point go? (a) 11.52 (b) 0.1152 (c) 1.152 (d) 0.01152
  39. 39.3.2 × 2 — where does the decimal point go? (a) 0.064 (b) 64 (c) 6.4 (d) 0.64
  40. 40.6.2 × 3 — where does the decimal point go? (a) 0.186 (b) 1.86 (c) 186 (d) 18.6

Answer key

  1. 1.35
  2. 4.32
  3. 67.2
  4. 5.72
  5. 15.12
  6. 11.6
  7. 4.95
  8. 335.4
  9. 2.64
  10. 4.55
  11. 5.88
  12. 5.04
  13. 2.16
  14. 64.6
  15. 6.63
  16. 37.44
  17. 37.8
  18. 1.74
  19. 0.24
  20. 65.8
  21. 1.32
  22. 46.8
  23. 14.55
  24. 1.836
  25. 2.88
  26. 1.152
  27. 20.4
  28. 381.8
  29. 11.16
  30. 3.71
  31. 149.6
  32. 0.57
  33. 356.4
  34. 40.48
  35. 0.117
  36. 4.08
  37. 3.22
  38. 1.152
  39. 6.4
  40. 18.6

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