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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 224 · 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. 1.2.1 × 0.2 — where does the decimal point go? (a) 4.2 (b) 0.42 (c) 0.042 (d) 0.0042
  2. 2.0.67 × 3.3 — where does the decimal point go? (a) 22.11 (b) 2.211 (c) 0.02211 (d) 0.2211
  3. 3.2.9 × 6 — where does the decimal point go? (a) 1.74 (b) 174 (c) 17.4 (d) 0.174
  4. 4.0.51 × 19 — where does the decimal point go? (a) 0.969 (b) 96.9 (c) 9.69 (d) 0.0969
  5. 5.0.41 × 3 — where does the decimal point go? (a) 1.23 (b) 0.0123 (c) 12.3 (d) 0.123
  6. 6.0.39 × 2.1 — where does the decimal point go? (a) 0.819 (b) 0.00819 (c) 0.0819 (d) 8.19
  7. 7.3.7 × 34 — where does the decimal point go? (a) 12.58 (b) 1258 (c) 1.258 (d) 125.8
  8. 8.0.35 × 7 — where does the decimal point go? (a) 0.0245 (b) 0.245 (c) 24.5 (d) 2.45
  9. 9.0.29 × 6 — where does the decimal point go? (a) 0.174 (b) 0.0174 (c) 17.4 (d) 1.74
  10. 10.4.4 × 29 — where does the decimal point go? (a) 127.6 (b) 12.76 (c) 1276 (d) 1.276
  11. 11.3.2 × 0.6 — where does the decimal point go? (a) 0.192 (b) 0.0192 (c) 1.92 (d) 19.2
  12. 12.9.9 × 1.5 — where does the decimal point go? (a) 14.85 (b) 148.5 (c) 0.1485 (d) 1.485
  13. 13.4.6 × 0.6 — where does the decimal point go? (a) 27.6 (b) 2.76 (c) 0.276 (d) 0.0276
  14. 14.2.1 × 3 — where does the decimal point go? (a) 0.63 (b) 63 (c) 6.3 (d) 0.063
  15. 15.0.86 × 0.9 — where does the decimal point go? (a) 7.74 (b) 0.00774 (c) 0.774 (d) 0.0774
  16. 16.2.7 × 22 — where does the decimal point go? (a) 0.594 (b) 5.94 (c) 594 (d) 59.4
  17. 17.0.19 × 0.7 — where does the decimal point go? (a) 1.33 (b) 0.0133 (c) 0.00133 (d) 0.133
  18. 18.9.2 × 3 — where does the decimal point go? (a) 27.6 (b) 276 (c) 0.276 (d) 2.76
  19. 19.7.7 × 8 — where does the decimal point go? (a) 0.616 (b) 6.16 (c) 616 (d) 61.6
  20. 20.2.6 × 2.2 — where does the decimal point go? (a) 0.572 (b) 5.72 (c) 57.2 (d) 0.0572
  21. 21.1.9 × 41 — where does the decimal point go? (a) 0.779 (b) 7.79 (c) 779 (d) 77.9
  22. 22.7.7 × 0.6 — where does the decimal point go? (a) 46.2 (b) 0.0462 (c) 4.62 (d) 0.462
  23. 23.8.2 × 33 — where does the decimal point go? (a) 2706 (b) 270.6 (c) 2.706 (d) 27.06
  24. 24.0.61 × 2.1 — where does the decimal point go? (a) 1.281 (b) 0.1281 (c) 0.01281 (d) 12.81
  25. 25.5.4 × 0.8 — where does the decimal point go? (a) 0.432 (b) 4.32 (c) 0.0432 (d) 43.2
  26. 26.6.7 × 7 — where does the decimal point go? (a) 4.69 (b) 0.469 (c) 46.9 (d) 469
  27. 27.1.2 × 32 — where does the decimal point go? (a) 3.84 (b) 38.4 (c) 384 (d) 0.384
  28. 28.8.7 × 5 — where does the decimal point go? (a) 0.435 (b) 435 (c) 43.5 (d) 4.35
  29. 29.0.71 × 42 — where does the decimal point go? (a) 2.982 (b) 298.2 (c) 29.82 (d) 0.2982
  30. 30.0.45 × 17 — where does the decimal point go? (a) 0.0765 (b) 0.765 (c) 7.65 (d) 76.5
  31. 31.8.8 × 0.2 — where does the decimal point go? (a) 1.76 (b) 0.176 (c) 17.6 (d) 0.0176
  32. 32.0.74 × 4.8 — where does the decimal point go? (a) 3.552 (b) 0.03552 (c) 35.52 (d) 0.3552
  33. 33.0.17 × 13 — where does the decimal point go? (a) 2.21 (b) 0.221 (c) 22.1 (d) 0.0221
  34. 34.3.4 × 0.6 — where does the decimal point go? (a) 20.4 (b) 2.04 (c) 0.0204 (d) 0.204
  35. 35.4.3 × 1.7 — where does the decimal point go? (a) 0.0731 (b) 0.731 (c) 7.31 (d) 73.1
  36. 36.0.67 × 3.6 — where does the decimal point go? (a) 24.12 (b) 0.2412 (c) 0.02412 (d) 2.412
  37. 37.0.22 × 9 — where does the decimal point go? (a) 0.0198 (b) 19.8 (c) 0.198 (d) 1.98
  38. 38.0.18 × 2 — where does the decimal point go? (a) 0.0036 (b) 0.036 (c) 3.6 (d) 0.36
  39. 39.0.62 × 0.3 — where does the decimal point go? (a) 1.86 (b) 0.0186 (c) 0.00186 (d) 0.186
  40. 40.0.48 × 13 — where does the decimal point go? (a) 0.624 (b) 6.24 (c) 62.4 (d) 0.0624

Answer key

  1. 0.42
  2. 2.211
  3. 17.4
  4. 9.69
  5. 1.23
  6. 0.819
  7. 125.8
  8. 2.45
  9. 1.74
  10. 127.6
  11. 1.92
  12. 14.85
  13. 2.76
  14. 6.3
  15. 0.774
  16. 59.4
  17. 0.133
  18. 27.6
  19. 61.6
  20. 5.72
  21. 77.9
  22. 4.62
  23. 270.6
  24. 1.281
  25. 4.32
  26. 46.9
  27. 38.4
  28. 43.5
  29. 29.82
  30. 7.65
  31. 1.76
  32. 3.552
  33. 2.21
  34. 2.04
  35. 7.31
  36. 2.412
  37. 1.98
  38. 0.36
  39. 0.186
  40. 6.24

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