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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 69 · 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. 1.2.3 × 3 — where does the decimal point go? (a) 69 (b) 0.069 (c) 0.69 (d) 6.9
  2. 2.0.92 × 47 — where does the decimal point go? (a) 432.4 (b) 4.324 (c) 43.24 (d) 0.4324
  3. 3.5.5 × 0.3 — where does the decimal point go? (a) 1.65 (b) 16.5 (c) 0.165 (d) 0.0165
  4. 4.3.7 × 3.8 — where does the decimal point go? (a) 140.6 (b) 0.1406 (c) 1.406 (d) 14.06
  5. 5.0.39 × 0.3 — where does the decimal point go? (a) 1.17 (b) 0.0117 (c) 0.00117 (d) 0.117
  6. 6.3.8 × 3 — where does the decimal point go? (a) 11.4 (b) 1.14 (c) 0.114 (d) 114
  7. 7.7.6 × 22 — where does the decimal point go? (a) 1.672 (b) 167.2 (c) 16.72 (d) 1672
  8. 8.7.9 × 1.1 — where does the decimal point go? (a) 0.869 (b) 0.0869 (c) 86.9 (d) 8.69
  9. 9.0.31 × 7 — where does the decimal point go? (a) 0.217 (b) 0.0217 (c) 2.17 (d) 21.7
  10. 10.4.3 × 0.5 — where does the decimal point go? (a) 21.5 (b) 0.215 (c) 0.0215 (d) 2.15
  11. 11.0.64 × 6 — where does the decimal point go? (a) 38.4 (b) 0.384 (c) 3.84 (d) 0.0384
  12. 12.0.12 × 0.2 — where does the decimal point go? (a) 0.0024 (b) 0.00024 (c) 0.024 (d) 0.24
  13. 13.0.77 × 21 — where does the decimal point go? (a) 16.17 (b) 0.1617 (c) 1.617 (d) 161.7
  14. 14.5.4 × 26 — where does the decimal point go? (a) 1404 (b) 14.04 (c) 140.4 (d) 1.404
  15. 15.9.8 × 3.2 — where does the decimal point go? (a) 3.136 (b) 0.3136 (c) 313.6 (d) 31.36
  16. 16.0.83 × 9 — where does the decimal point go? (a) 7.47 (b) 74.7 (c) 0.0747 (d) 0.747
  17. 17.0.86 × 6 — where does the decimal point go? (a) 51.6 (b) 0.516 (c) 5.16 (d) 0.0516
  18. 18.4.6 × 48 — where does the decimal point go? (a) 22.08 (b) 220.8 (c) 2.208 (d) 2208
  19. 19.0.28 × 0.3 — where does the decimal point go? (a) 0.0084 (b) 0.084 (c) 0.00084 (d) 0.84
  20. 20.9.6 × 7 — where does the decimal point go? (a) 6.72 (b) 67.2 (c) 672 (d) 0.672
  21. 21.0.29 × 23 — where does the decimal point go? (a) 0.0667 (b) 0.667 (c) 66.7 (d) 6.67
  22. 22.0.13 × 4.9 — where does the decimal point go? (a) 6.37 (b) 0.00637 (c) 0.637 (d) 0.0637
  23. 23.0.29 × 27 — where does the decimal point go? (a) 0.783 (b) 78.3 (c) 0.0783 (d) 7.83
  24. 24.0.14 × 21 — where does the decimal point go? (a) 0.0294 (b) 0.294 (c) 29.4 (d) 2.94
  25. 25.0.37 × 4 — where does the decimal point go? (a) 0.0148 (b) 1.48 (c) 0.148 (d) 14.8
  26. 26.0.32 × 0.4 — where does the decimal point go? (a) 0.00128 (b) 0.0128 (c) 1.28 (d) 0.128
  27. 27.0.97 × 29 — where does the decimal point go? (a) 281.3 (b) 0.2813 (c) 28.13 (d) 2.813
  28. 28.7.3 × 45 — where does the decimal point go? (a) 32.85 (b) 3285 (c) 328.5 (d) 3.285
  29. 29.0.23 × 43 — where does the decimal point go? (a) 98.9 (b) 9.89 (c) 0.0989 (d) 0.989
  30. 30.3.2 × 4 — where does the decimal point go? (a) 0.128 (b) 1.28 (c) 12.8 (d) 128
  31. 31.0.98 × 2 — where does the decimal point go? (a) 1.96 (b) 0.196 (c) 19.6 (d) 0.0196
  32. 32.0.21 × 0.8 — where does the decimal point go? (a) 1.68 (b) 0.0168 (c) 0.168 (d) 0.00168
  33. 33.0.96 × 19 — where does the decimal point go? (a) 182.4 (b) 18.24 (c) 0.1824 (d) 1.824
  34. 34.0.12 × 0.4 — where does the decimal point go? (a) 0.048 (b) 0.0048 (c) 0.00048 (d) 0.48
  35. 35.6.6 × 3 — where does the decimal point go? (a) 1.98 (b) 19.8 (c) 198 (d) 0.198
  36. 36.5.8 × 0.9 — where does the decimal point go? (a) 5.22 (b) 0.522 (c) 0.0522 (d) 52.2
  37. 37.7.4 × 4 — where does the decimal point go? (a) 2.96 (b) 29.6 (c) 0.296 (d) 296
  38. 38.1.9 × 48 — where does the decimal point go? (a) 9.12 (b) 0.912 (c) 91.2 (d) 912
  39. 39.0.95 × 9 — where does the decimal point go? (a) 85.5 (b) 0.855 (c) 0.0855 (d) 8.55
  40. 40.0.48 × 18 — where does the decimal point go? (a) 0.0864 (b) 0.864 (c) 86.4 (d) 8.64

Answer key

  1. 6.9
  2. 43.24
  3. 1.65
  4. 14.06
  5. 0.117
  6. 11.4
  7. 167.2
  8. 8.69
  9. 2.17
  10. 2.15
  11. 3.84
  12. 0.024
  13. 16.17
  14. 140.4
  15. 31.36
  16. 7.47
  17. 5.16
  18. 220.8
  19. 0.084
  20. 67.2
  21. 6.67
  22. 0.637
  23. 7.83
  24. 2.94
  25. 1.48
  26. 0.128
  27. 28.13
  28. 328.5
  29. 9.89
  30. 12.8
  31. 1.96
  32. 0.168
  33. 18.24
  34. 0.048
  35. 19.8
  36. 5.22
  37. 29.6
  38. 91.2
  39. 8.55
  40. 8.64

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