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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 857 · 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. 1.0.36 × 0.6 — where does the decimal point go? (a) 0.0216 (b) 2.16 (c) 0.216 (d) 0.00216
  2. 2.8.1 × 37 — where does the decimal point go? (a) 2.997 (b) 2997 (c) 299.7 (d) 29.97
  3. 3.0.52 × 0.3 — where does the decimal point go? (a) 0.00156 (b) 1.56 (c) 0.0156 (d) 0.156
  4. 4.0.79 × 3.4 — where does the decimal point go? (a) 2.686 (b) 0.2686 (c) 0.02686 (d) 26.86
  5. 5.7.7 × 3 — where does the decimal point go? (a) 23.1 (b) 0.231 (c) 231 (d) 2.31
  6. 6.0.52 × 29 — where does the decimal point go? (a) 15.08 (b) 150.8 (c) 1.508 (d) 0.1508
  7. 7.2.9 × 0.5 — where does the decimal point go? (a) 0.0145 (b) 14.5 (c) 0.145 (d) 1.45
  8. 8.0.37 × 0.9 — where does the decimal point go? (a) 0.333 (b) 3.33 (c) 0.0333 (d) 0.00333
  9. 9.1.8 × 3.4 — where does the decimal point go? (a) 6.12 (b) 61.2 (c) 0.0612 (d) 0.612
  10. 10.1.3 × 1.3 — where does the decimal point go? (a) 0.0169 (b) 16.9 (c) 1.69 (d) 0.169
  11. 11.9.1 × 8 — where does the decimal point go? (a) 728 (b) 72.8 (c) 0.728 (d) 7.28
  12. 12.1.9 × 6 — where does the decimal point go? (a) 0.114 (b) 1.14 (c) 114 (d) 11.4
  13. 13.2.7 × 21 — where does the decimal point go? (a) 5.67 (b) 0.567 (c) 56.7 (d) 567
  14. 14.2.6 × 7 — where does the decimal point go? (a) 18.2 (b) 182 (c) 1.82 (d) 0.182
  15. 15.0.84 × 7 — where does the decimal point go? (a) 0.0588 (b) 0.588 (c) 5.88 (d) 58.8
  16. 16.3.7 × 0.4 — where does the decimal point go? (a) 0.148 (b) 14.8 (c) 1.48 (d) 0.0148
  17. 17.7.2 × 1.4 — where does the decimal point go? (a) 100.8 (b) 1.008 (c) 10.08 (d) 0.1008
  18. 18.0.78 × 3.4 — where does the decimal point go? (a) 2.652 (b) 0.02652 (c) 26.52 (d) 0.2652
  19. 19.8.1 × 0.2 — where does the decimal point go? (a) 0.162 (b) 0.0162 (c) 1.62 (d) 16.2
  20. 20.0.96 × 7 — where does the decimal point go? (a) 0.0672 (b) 6.72 (c) 0.672 (d) 67.2
  21. 21.4.4 × 0.9 — where does the decimal point go? (a) 39.6 (b) 0.396 (c) 0.0396 (d) 3.96
  22. 22.0.28 × 0.3 — where does the decimal point go? (a) 0.084 (b) 0.00084 (c) 0.0084 (d) 0.84
  23. 23.1.2 × 24 — where does the decimal point go? (a) 2.88 (b) 288 (c) 28.8 (d) 0.288
  24. 24.0.49 × 2 — where does the decimal point go? (a) 0.0098 (b) 9.8 (c) 0.098 (d) 0.98
  25. 25.0.39 × 0.9 — where does the decimal point go? (a) 3.51 (b) 0.0351 (c) 0.00351 (d) 0.351
  26. 26.7.9 × 28 — where does the decimal point go? (a) 221.2 (b) 2212 (c) 22.12 (d) 2.212
  27. 27.4.6 × 16 — where does the decimal point go? (a) 0.736 (b) 736 (c) 7.36 (d) 73.6
  28. 28.0.66 × 8 — where does the decimal point go? (a) 52.8 (b) 0.528 (c) 5.28 (d) 0.0528
  29. 29.0.24 × 4 — where does the decimal point go? (a) 0.0096 (b) 9.6 (c) 0.96 (d) 0.096
  30. 30.8.9 × 1.2 — where does the decimal point go? (a) 0.1068 (b) 1.068 (c) 106.8 (d) 10.68
  31. 31.9.9 × 11 — where does the decimal point go? (a) 10.89 (b) 1089 (c) 108.9 (d) 1.089
  32. 32.3.4 × 24 — where does the decimal point go? (a) 816 (b) 8.16 (c) 81.6 (d) 0.816
  33. 33.0.31 × 0.2 — where does the decimal point go? (a) 0.00062 (b) 0.062 (c) 0.0062 (d) 0.62
  34. 34.0.33 × 2 — where does the decimal point go? (a) 0.66 (b) 0.066 (c) 6.6 (d) 0.0066
  35. 35.7.4 × 9 — where does the decimal point go? (a) 66.6 (b) 0.666 (c) 666 (d) 6.66
  36. 36.1.5 × 1.5 — where does the decimal point go? (a) 0.0225 (b) 22.5 (c) 0.225 (d) 2.25
  37. 37.0.81 × 45 — where does the decimal point go? (a) 364.5 (b) 0.3645 (c) 3.645 (d) 36.45
  38. 38.7.9 × 0.2 — where does the decimal point go? (a) 0.158 (b) 0.0158 (c) 15.8 (d) 1.58
  39. 39.5.1 × 18 — where does the decimal point go? (a) 0.918 (b) 9.18 (c) 91.8 (d) 918
  40. 40.6.3 × 0.7 — where does the decimal point go? (a) 0.0441 (b) 4.41 (c) 44.1 (d) 0.441

Answer key

  1. 0.216
  2. 299.7
  3. 0.156
  4. 2.686
  5. 23.1
  6. 15.08
  7. 1.45
  8. 0.333
  9. 6.12
  10. 1.69
  11. 72.8
  12. 11.4
  13. 56.7
  14. 18.2
  15. 5.88
  16. 1.48
  17. 10.08
  18. 2.652
  19. 1.62
  20. 6.72
  21. 3.96
  22. 0.084
  23. 28.8
  24. 0.98
  25. 0.351
  26. 221.2
  27. 73.6
  28. 5.28
  29. 0.96
  30. 10.68
  31. 108.9
  32. 81.6
  33. 0.062
  34. 0.66
  35. 66.6
  36. 2.25
  37. 36.45
  38. 1.58
  39. 91.8
  40. 4.41

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