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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 357 · 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. 1.8.6 × 4 — where does the decimal point go? (a) 344 (b) 0.344 (c) 3.44 (d) 34.4
  2. 2.7.6 × 11 — where does the decimal point go? (a) 0.836 (b) 83.6 (c) 8.36 (d) 836
  3. 3.0.63 × 39 — where does the decimal point go? (a) 2.457 (b) 24.57 (c) 0.2457 (d) 245.7
  4. 4.5.9 × 35 — where does the decimal point go? (a) 2.065 (b) 20.65 (c) 2065 (d) 206.5
  5. 5.0.34 × 1.1 — where does the decimal point go? (a) 0.374 (b) 0.00374 (c) 3.74 (d) 0.0374
  6. 6.0.72 × 1.6 — where does the decimal point go? (a) 1.152 (b) 11.52 (c) 0.1152 (d) 0.01152
  7. 7.4.6 × 6 — where does the decimal point go? (a) 276 (b) 27.6 (c) 0.276 (d) 2.76
  8. 8.1.5 × 0.3 — where does the decimal point go? (a) 0.0045 (b) 0.45 (c) 0.045 (d) 4.5
  9. 9.3.9 × 1.7 — where does the decimal point go? (a) 0.0663 (b) 0.663 (c) 66.3 (d) 6.63
  10. 10.0.41 × 3 — where does the decimal point go? (a) 12.3 (b) 1.23 (c) 0.123 (d) 0.0123
  11. 11.4.4 × 4 — where does the decimal point go? (a) 17.6 (b) 1.76 (c) 176 (d) 0.176
  12. 12.0.41 × 4 — where does the decimal point go? (a) 0.0164 (b) 16.4 (c) 1.64 (d) 0.164
  13. 13.0.28 × 4.8 — where does the decimal point go? (a) 0.1344 (b) 1.344 (c) 0.01344 (d) 13.44
  14. 14.0.14 × 8 — where does the decimal point go? (a) 0.0112 (b) 11.2 (c) 0.112 (d) 1.12
  15. 15.6.9 × 2 — where does the decimal point go? (a) 0.138 (b) 1.38 (c) 138 (d) 13.8
  16. 16.0.59 × 1.4 — where does the decimal point go? (a) 8.26 (b) 0.0826 (c) 0.826 (d) 0.00826
  17. 17.9.8 × 2.8 — where does the decimal point go? (a) 27.44 (b) 274.4 (c) 0.2744 (d) 2.744
  18. 18.1.2 × 13 — where does the decimal point go? (a) 0.156 (b) 15.6 (c) 1.56 (d) 156
  19. 19.0.73 × 1.9 — where does the decimal point go? (a) 1.387 (b) 0.01387 (c) 13.87 (d) 0.1387
  20. 20.0.76 × 0.7 — where does the decimal point go? (a) 0.00532 (b) 5.32 (c) 0.0532 (d) 0.532
  21. 21.8.9 × 0.2 — where does the decimal point go? (a) 0.178 (b) 1.78 (c) 0.0178 (d) 17.8
  22. 22.7.6 × 4.1 — where does the decimal point go? (a) 0.3116 (b) 3.116 (c) 31.16 (d) 311.6
  23. 23.4.6 × 0.6 — where does the decimal point go? (a) 0.276 (b) 2.76 (c) 0.0276 (d) 27.6
  24. 24.8.3 × 2 — where does the decimal point go? (a) 1.66 (b) 16.6 (c) 0.166 (d) 166
  25. 25.0.27 × 1.5 — where does the decimal point go? (a) 0.405 (b) 0.00405 (c) 4.05 (d) 0.0405
  26. 26.0.19 × 49 — where does the decimal point go? (a) 9.31 (b) 0.0931 (c) 0.931 (d) 93.1
  27. 27.8.7 × 9 — where does the decimal point go? (a) 7.83 (b) 0.783 (c) 78.3 (d) 783
  28. 28.5.2 × 4 — where does the decimal point go? (a) 208 (b) 20.8 (c) 2.08 (d) 0.208
  29. 29.0.88 × 2 — where does the decimal point go? (a) 1.76 (b) 17.6 (c) 0.0176 (d) 0.176
  30. 30.2.6 × 28 — where does the decimal point go? (a) 0.728 (b) 72.8 (c) 728 (d) 7.28
  31. 31.2.8 × 3 — where does the decimal point go? (a) 84 (b) 0.84 (c) 0.084 (d) 8.4
  32. 32.5.6 × 41 — where does the decimal point go? (a) 22.96 (b) 2296 (c) 229.6 (d) 2.296
  33. 33.6.6 × 0.3 — where does the decimal point go? (a) 0.0198 (b) 0.198 (c) 19.8 (d) 1.98
  34. 34.0.94 × 2 — where does the decimal point go? (a) 0.188 (b) 0.0188 (c) 18.8 (d) 1.88
  35. 35.5.5 × 3 — where does the decimal point go? (a) 0.165 (b) 1.65 (c) 165 (d) 16.5
  36. 36.5.8 × 1.3 — where does the decimal point go? (a) 7.54 (b) 0.754 (c) 75.4 (d) 0.0754
  37. 37.2.5 × 33 — where does the decimal point go? (a) 0.825 (b) 825 (c) 8.25 (d) 82.5
  38. 38.1.3 × 1.2 — where does the decimal point go? (a) 15.6 (b) 1.56 (c) 0.156 (d) 0.0156
  39. 39.8.3 × 0.9 — where does the decimal point go? (a) 0.0747 (b) 74.7 (c) 0.747 (d) 7.47
  40. 40.0.62 × 3.7 — where does the decimal point go? (a) 22.94 (b) 0.02294 (c) 0.2294 (d) 2.294

Answer key

  1. 34.4
  2. 83.6
  3. 24.57
  4. 206.5
  5. 0.374
  6. 1.152
  7. 27.6
  8. 0.45
  9. 6.63
  10. 1.23
  11. 17.6
  12. 1.64
  13. 1.344
  14. 1.12
  15. 13.8
  16. 0.826
  17. 27.44
  18. 15.6
  19. 1.387
  20. 0.532
  21. 1.78
  22. 31.16
  23. 2.76
  24. 16.6
  25. 0.405
  26. 9.31
  27. 78.3
  28. 20.8
  29. 1.76
  30. 72.8
  31. 8.4
  32. 229.6
  33. 1.98
  34. 1.88
  35. 16.5
  36. 7.54
  37. 82.5
  38. 1.56
  39. 7.47
  40. 2.294

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