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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 569 · 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. 1.0.82 × 3.2 — where does the decimal point go? (a) 0.2624 (b) 2.624 (c) 26.24 (d) 0.02624
  2. 2.0.45 × 25 — where does the decimal point go? (a) 1.125 (b) 0.1125 (c) 11.25 (d) 112.5
  3. 3.0.49 × 6 — where does the decimal point go? (a) 0.294 (b) 29.4 (c) 0.0294 (d) 2.94
  4. 4.2.2 × 44 — where does the decimal point go? (a) 96.8 (b) 0.968 (c) 9.68 (d) 968
  5. 5.4.4 × 7 — where does the decimal point go? (a) 30.8 (b) 3.08 (c) 0.308 (d) 308
  6. 6.3.6 × 8 — where does the decimal point go? (a) 0.288 (b) 288 (c) 2.88 (d) 28.8
  7. 7.7.1 × 24 — where does the decimal point go? (a) 17.04 (b) 170.4 (c) 1.704 (d) 1704
  8. 8.0.59 × 17 — where does the decimal point go? (a) 0.1003 (b) 1.003 (c) 100.3 (d) 10.03
  9. 9.0.29 × 4.5 — where does the decimal point go? (a) 0.1305 (b) 1.305 (c) 0.01305 (d) 13.05
  10. 10.8.3 × 2 — where does the decimal point go? (a) 1.66 (b) 166 (c) 0.166 (d) 16.6
  11. 11.8.4 × 39 — where does the decimal point go? (a) 3276 (b) 32.76 (c) 3.276 (d) 327.6
  12. 12.0.97 × 0.8 — where does the decimal point go? (a) 0.00776 (b) 0.0776 (c) 7.76 (d) 0.776
  13. 13.0.28 × 0.4 — where does the decimal point go? (a) 1.12 (b) 0.00112 (c) 0.112 (d) 0.0112
  14. 14.3.1 × 4 — where does the decimal point go? (a) 12.4 (b) 0.124 (c) 1.24 (d) 124
  15. 15.0.14 × 0.3 — where does the decimal point go? (a) 0.42 (b) 0.042 (c) 0.00042 (d) 0.0042
  16. 16.0.62 × 7 — where does the decimal point go? (a) 4.34 (b) 0.0434 (c) 0.434 (d) 43.4
  17. 17.7.2 × 31 — where does the decimal point go? (a) 2232 (b) 2.232 (c) 22.32 (d) 223.2
  18. 18.0.71 × 0.6 — where does the decimal point go? (a) 0.426 (b) 4.26 (c) 0.00426 (d) 0.0426
  19. 19.0.65 × 0.3 — where does the decimal point go? (a) 0.0195 (b) 0.00195 (c) 1.95 (d) 0.195
  20. 20.1.4 × 2.8 — where does the decimal point go? (a) 3.92 (b) 0.392 (c) 39.2 (d) 0.0392
  21. 21.0.48 × 1.2 — where does the decimal point go? (a) 0.576 (b) 0.0576 (c) 5.76 (d) 0.00576
  22. 22.0.27 × 11 — where does the decimal point go? (a) 29.7 (b) 0.0297 (c) 0.297 (d) 2.97
  23. 23.0.43 × 0.5 — where does the decimal point go? (a) 0.215 (b) 0.00215 (c) 2.15 (d) 0.0215
  24. 24.4.7 × 3 — where does the decimal point go? (a) 14.1 (b) 0.141 (c) 1.41 (d) 141
  25. 25.1.4 × 2 — where does the decimal point go? (a) 0.28 (b) 28 (c) 0.028 (d) 2.8
  26. 26.0.19 × 8 — where does the decimal point go? (a) 1.52 (b) 0.152 (c) 15.2 (d) 0.0152
  27. 27.0.67 × 9 — where does the decimal point go? (a) 0.603 (b) 0.0603 (c) 6.03 (d) 60.3
  28. 28.0.47 × 4 — where does the decimal point go? (a) 0.0188 (b) 1.88 (c) 18.8 (d) 0.188
  29. 29.0.57 × 6 — where does the decimal point go? (a) 34.2 (b) 3.42 (c) 0.0342 (d) 0.342
  30. 30.1.8 × 28 — where does the decimal point go? (a) 0.504 (b) 5.04 (c) 50.4 (d) 504
  31. 31.8.3 × 0.4 — where does the decimal point go? (a) 33.2 (b) 0.0332 (c) 0.332 (d) 3.32
  32. 32.7.2 × 1.9 — where does the decimal point go? (a) 1.368 (b) 0.1368 (c) 136.8 (d) 13.68
  33. 33.0.31 × 11 — where does the decimal point go? (a) 0.341 (b) 0.0341 (c) 34.1 (d) 3.41
  34. 34.0.33 × 41 — where does the decimal point go? (a) 0.1353 (b) 13.53 (c) 1.353 (d) 135.3
  35. 35.3.4 × 24 — where does the decimal point go? (a) 8.16 (b) 0.816 (c) 816 (d) 81.6
  36. 36.2.2 × 8 — where does the decimal point go? (a) 1.76 (b) 0.176 (c) 17.6 (d) 176
  37. 37.3.3 × 4.5 — where does the decimal point go? (a) 148.5 (b) 0.1485 (c) 1.485 (d) 14.85
  38. 38.7.4 × 3.9 — where does the decimal point go? (a) 28.86 (b) 2.886 (c) 0.2886 (d) 288.6
  39. 39.0.47 × 9 — where does the decimal point go? (a) 0.423 (b) 4.23 (c) 0.0423 (d) 42.3
  40. 40.0.27 × 6 — where does the decimal point go? (a) 1.62 (b) 16.2 (c) 0.0162 (d) 0.162

Answer key

  1. 2.624
  2. 11.25
  3. 2.94
  4. 96.8
  5. 30.8
  6. 28.8
  7. 170.4
  8. 10.03
  9. 1.305
  10. 16.6
  11. 327.6
  12. 0.776
  13. 0.112
  14. 12.4
  15. 0.042
  16. 4.34
  17. 223.2
  18. 0.426
  19. 0.195
  20. 3.92
  21. 0.576
  22. 2.97
  23. 0.215
  24. 14.1
  25. 2.8
  26. 1.52
  27. 6.03
  28. 1.88
  29. 3.42
  30. 50.4
  31. 3.32
  32. 13.68
  33. 3.41
  34. 13.53
  35. 81.6
  36. 17.6
  37. 14.85
  38. 28.86
  39. 4.23
  40. 1.62

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