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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 837 · 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. 1.0.18 × 29 — where does the decimal point go? (a) 0.522 (b) 0.0522 (c) 5.22 (d) 52.2
  2. 2.6.3 × 0.2 — where does the decimal point go? (a) 12.6 (b) 1.26 (c) 0.0126 (d) 0.126
  3. 3.4.3 × 5 — where does the decimal point go? (a) 2.15 (b) 215 (c) 21.5 (d) 0.215
  4. 4.3.7 × 0.6 — where does the decimal point go? (a) 2.22 (b) 0.0222 (c) 22.2 (d) 0.222
  5. 5.7.5 × 5 — where does the decimal point go? (a) 3.75 (b) 37.5 (c) 0.375 (d) 375
  6. 6.7.5 × 3.1 — where does the decimal point go? (a) 0.2325 (b) 2.325 (c) 23.25 (d) 232.5
  7. 7.1.6 × 6 — where does the decimal point go? (a) 0.96 (b) 9.6 (c) 96 (d) 0.096
  8. 8.4.9 × 0.6 — where does the decimal point go? (a) 0.294 (b) 2.94 (c) 0.0294 (d) 29.4
  9. 9.4.4 × 34 — where does the decimal point go? (a) 1496 (b) 1.496 (c) 149.6 (d) 14.96
  10. 10.0.33 × 8 — where does the decimal point go? (a) 2.64 (b) 0.0264 (c) 26.4 (d) 0.264
  11. 11.0.44 × 9 — where does the decimal point go? (a) 3.96 (b) 39.6 (c) 0.0396 (d) 0.396
  12. 12.0.49 × 0.5 — where does the decimal point go? (a) 0.00245 (b) 0.245 (c) 2.45 (d) 0.0245
  13. 13.2.8 × 1.3 — where does the decimal point go? (a) 0.0364 (b) 0.364 (c) 3.64 (d) 36.4
  14. 14.8.1 × 34 — where does the decimal point go? (a) 27.54 (b) 2754 (c) 2.754 (d) 275.4
  15. 15.0.61 × 15 — where does the decimal point go? (a) 0.915 (b) 9.15 (c) 91.5 (d) 0.0915
  16. 16.5.9 × 48 — where does the decimal point go? (a) 283.2 (b) 2.832 (c) 28.32 (d) 2832
  17. 17.0.23 × 0.2 — where does the decimal point go? (a) 0.00046 (b) 0.0046 (c) 0.46 (d) 0.046
  18. 18.3.7 × 3.8 — where does the decimal point go? (a) 14.06 (b) 0.1406 (c) 1.406 (d) 140.6
  19. 19.0.47 × 2.9 — where does the decimal point go? (a) 1.363 (b) 13.63 (c) 0.01363 (d) 0.1363
  20. 20.0.77 × 38 — where does the decimal point go? (a) 292.6 (b) 0.2926 (c) 2.926 (d) 29.26
  21. 21.0.98 × 0.2 — where does the decimal point go? (a) 0.00196 (b) 1.96 (c) 0.196 (d) 0.0196
  22. 22.0.86 × 33 — where does the decimal point go? (a) 0.2838 (b) 283.8 (c) 28.38 (d) 2.838
  23. 23.8.7 × 6 — where does the decimal point go? (a) 52.2 (b) 0.522 (c) 5.22 (d) 522
  24. 24.2.9 × 0.5 — where does the decimal point go? (a) 14.5 (b) 0.0145 (c) 1.45 (d) 0.145
  25. 25.0.49 × 0.7 — where does the decimal point go? (a) 0.0343 (b) 0.00343 (c) 3.43 (d) 0.343
  26. 26.6.3 × 0.3 — where does the decimal point go? (a) 0.0189 (b) 1.89 (c) 0.189 (d) 18.9
  27. 27.9.7 × 8 — where does the decimal point go? (a) 7.76 (b) 776 (c) 77.6 (d) 0.776
  28. 28.0.28 × 0.3 — where does the decimal point go? (a) 0.084 (b) 0.84 (c) 0.0084 (d) 0.00084
  29. 29.2.3 × 2 — where does the decimal point go? (a) 4.6 (b) 46 (c) 0.046 (d) 0.46
  30. 30.9.7 × 38 — where does the decimal point go? (a) 3686 (b) 3.686 (c) 36.86 (d) 368.6
  31. 31.0.62 × 0.2 — where does the decimal point go? (a) 1.24 (b) 0.0124 (c) 0.124 (d) 0.00124
  32. 32.0.86 × 8 — where does the decimal point go? (a) 6.88 (b) 0.0688 (c) 0.688 (d) 68.8
  33. 33.2.8 × 2.9 — where does the decimal point go? (a) 8.12 (b) 0.812 (c) 0.0812 (d) 81.2
  34. 34.0.26 × 0.3 — where does the decimal point go? (a) 0.00078 (b) 0.0078 (c) 0.78 (d) 0.078
  35. 35.0.36 × 8 — where does the decimal point go? (a) 2.88 (b) 0.0288 (c) 28.8 (d) 0.288
  36. 36.0.57 × 24 — where does the decimal point go? (a) 1.368 (b) 136.8 (c) 13.68 (d) 0.1368
  37. 37.0.43 × 0.5 — where does the decimal point go? (a) 0.00215 (b) 0.215 (c) 0.0215 (d) 2.15
  38. 38.1.3 × 7 — where does the decimal point go? (a) 91 (b) 0.91 (c) 9.1 (d) 0.091
  39. 39.0.96 × 2.3 — where does the decimal point go? (a) 0.2208 (b) 0.02208 (c) 2.208 (d) 22.08
  40. 40.9.2 × 6 — where does the decimal point go? (a) 552 (b) 0.552 (c) 55.2 (d) 5.52

Answer key

  1. 5.22
  2. 1.26
  3. 21.5
  4. 2.22
  5. 37.5
  6. 23.25
  7. 9.6
  8. 2.94
  9. 149.6
  10. 2.64
  11. 3.96
  12. 0.245
  13. 3.64
  14. 275.4
  15. 9.15
  16. 283.2
  17. 0.046
  18. 14.06
  19. 1.363
  20. 29.26
  21. 0.196
  22. 28.38
  23. 52.2
  24. 1.45
  25. 0.343
  26. 1.89
  27. 77.6
  28. 0.084
  29. 4.6
  30. 368.6
  31. 0.124
  32. 6.88
  33. 8.12
  34. 0.078
  35. 2.88
  36. 13.68
  37. 0.215
  38. 9.1
  39. 2.208
  40. 55.2

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