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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 617 · 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. 1.0.55 × 9 — where does the decimal point go? (a) 0.0495 (b) 4.95 (c) 0.495 (d) 49.5
  2. 2.0.14 × 0.8 — where does the decimal point go? (a) 1.12 (b) 0.00112 (c) 0.0112 (d) 0.112
  3. 3.0.76 × 4.2 — where does the decimal point go? (a) 3.192 (b) 0.03192 (c) 31.92 (d) 0.3192
  4. 4.0.42 × 0.9 — where does the decimal point go? (a) 0.00378 (b) 0.0378 (c) 3.78 (d) 0.378
  5. 5.1.6 × 0.6 — where does the decimal point go? (a) 0.96 (b) 0.0096 (c) 9.6 (d) 0.096
  6. 6.0.89 × 7 — where does the decimal point go? (a) 0.623 (b) 0.0623 (c) 62.3 (d) 6.23
  7. 7.2.1 × 4.5 — where does the decimal point go? (a) 0.945 (b) 9.45 (c) 0.0945 (d) 94.5
  8. 8.3.1 × 4.5 — where does the decimal point go? (a) 139.5 (b) 0.1395 (c) 1.395 (d) 13.95
  9. 9.0.21 × 18 — where does the decimal point go? (a) 3.78 (b) 37.8 (c) 0.378 (d) 0.0378
  10. 10.2.9 × 46 — where does the decimal point go? (a) 133.4 (b) 1334 (c) 1.334 (d) 13.34
  11. 11.0.63 × 9 — where does the decimal point go? (a) 0.567 (b) 5.67 (c) 0.0567 (d) 56.7
  12. 12.3.5 × 0.9 — where does the decimal point go? (a) 3.15 (b) 0.315 (c) 0.0315 (d) 31.5
  13. 13.3.6 × 7 — where does the decimal point go? (a) 0.252 (b) 252 (c) 25.2 (d) 2.52
  14. 14.2.4 × 2.9 — where does the decimal point go? (a) 0.0696 (b) 6.96 (c) 0.696 (d) 69.6
  15. 15.4.5 × 3 — where does the decimal point go? (a) 135 (b) 1.35 (c) 13.5 (d) 0.135
  16. 16.9.3 × 9 — where does the decimal point go? (a) 8.37 (b) 837 (c) 0.837 (d) 83.7
  17. 17.0.29 × 1.6 — where does the decimal point go? (a) 0.0464 (b) 0.464 (c) 0.00464 (d) 4.64
  18. 18.0.58 × 0.6 — where does the decimal point go? (a) 0.0348 (b) 0.348 (c) 0.00348 (d) 3.48
  19. 19.6.9 × 2 — where does the decimal point go? (a) 1.38 (b) 138 (c) 0.138 (d) 13.8
  20. 20.9.7 × 2.2 — where does the decimal point go? (a) 0.2134 (b) 21.34 (c) 213.4 (d) 2.134
  21. 21.0.76 × 29 — where does the decimal point go? (a) 2.204 (b) 220.4 (c) 22.04 (d) 0.2204
  22. 22.9.6 × 43 — where does the decimal point go? (a) 412.8 (b) 4128 (c) 4.128 (d) 41.28
  23. 23.0.48 × 7 — where does the decimal point go? (a) 0.336 (b) 0.0336 (c) 3.36 (d) 33.6
  24. 24.0.75 × 9 — where does the decimal point go? (a) 0.0675 (b) 6.75 (c) 67.5 (d) 0.675
  25. 25.0.86 × 0.9 — where does the decimal point go? (a) 0.774 (b) 0.0774 (c) 0.00774 (d) 7.74
  26. 26.9.2 × 0.6 — where does the decimal point go? (a) 0.552 (b) 0.0552 (c) 55.2 (d) 5.52
  27. 27.3.7 × 11 — where does the decimal point go? (a) 4.07 (b) 407 (c) 40.7 (d) 0.407
  28. 28.6.2 × 37 — where does the decimal point go? (a) 2.294 (b) 229.4 (c) 22.94 (d) 2294
  29. 29.0.82 × 0.9 — where does the decimal point go? (a) 0.00738 (b) 0.738 (c) 0.0738 (d) 7.38
  30. 30.3.4 × 7 — where does the decimal point go? (a) 23.8 (b) 238 (c) 2.38 (d) 0.238
  31. 31.7.2 × 8 — where does the decimal point go? (a) 576 (b) 5.76 (c) 57.6 (d) 0.576
  32. 32.5.4 × 9 — where does the decimal point go? (a) 48.6 (b) 4.86 (c) 0.486 (d) 486
  33. 33.0.17 × 8 — where does the decimal point go? (a) 0.136 (b) 0.0136 (c) 1.36 (d) 13.6
  34. 34.0.68 × 4 — where does the decimal point go? (a) 2.72 (b) 0.272 (c) 0.0272 (d) 27.2
  35. 35.0.24 × 22 — where does the decimal point go? (a) 0.528 (b) 5.28 (c) 0.0528 (d) 52.8
  36. 36.4.2 × 0.9 — where does the decimal point go? (a) 37.8 (b) 0.0378 (c) 0.378 (d) 3.78
  37. 37.3.2 × 9 — where does the decimal point go? (a) 0.288 (b) 2.88 (c) 288 (d) 28.8
  38. 38.0.16 × 0.3 — where does the decimal point go? (a) 0.48 (b) 0.0048 (c) 0.00048 (d) 0.048
  39. 39.7.9 × 2.5 — where does the decimal point go? (a) 1.975 (b) 19.75 (c) 0.1975 (d) 197.5
  40. 40.0.17 × 1.6 — where does the decimal point go? (a) 0.272 (b) 0.00272 (c) 0.0272 (d) 2.72

Answer key

  1. 4.95
  2. 0.112
  3. 3.192
  4. 0.378
  5. 0.96
  6. 6.23
  7. 9.45
  8. 13.95
  9. 3.78
  10. 133.4
  11. 5.67
  12. 3.15
  13. 25.2
  14. 6.96
  15. 13.5
  16. 83.7
  17. 0.464
  18. 0.348
  19. 13.8
  20. 21.34
  21. 22.04
  22. 412.8
  23. 3.36
  24. 6.75
  25. 0.774
  26. 5.52
  27. 40.7
  28. 229.4
  29. 0.738
  30. 23.8
  31. 57.6
  32. 48.6
  33. 1.36
  34. 2.72
  35. 5.28
  36. 3.78
  37. 28.8
  38. 0.048
  39. 19.75
  40. 0.272

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