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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 148 · 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. 1.2.2 × 0.9 — where does the decimal point go? (a) 0.198 (b) 0.0198 (c) 1.98 (d) 19.8
  2. 2.5.9 × 3 — where does the decimal point go? (a) 177 (b) 1.77 (c) 0.177 (d) 17.7
  3. 3.1.3 × 0.5 — where does the decimal point go? (a) 0.0065 (b) 6.5 (c) 0.065 (d) 0.65
  4. 4.5.3 × 1.6 — where does the decimal point go? (a) 8.48 (b) 0.0848 (c) 84.8 (d) 0.848
  5. 5.0.66 × 1.8 — where does the decimal point go? (a) 11.88 (b) 1.188 (c) 0.1188 (d) 0.01188
  6. 6.7.2 × 2.3 — where does the decimal point go? (a) 1.656 (b) 0.1656 (c) 16.56 (d) 165.6
  7. 7.0.12 × 47 — where does the decimal point go? (a) 0.564 (b) 56.4 (c) 0.0564 (d) 5.64
  8. 8.0.87 × 4 — where does the decimal point go? (a) 3.48 (b) 0.348 (c) 0.0348 (d) 34.8
  9. 9.0.59 × 6 — where does the decimal point go? (a) 35.4 (b) 0.354 (c) 3.54 (d) 0.0354
  10. 10.0.86 × 0.2 — where does the decimal point go? (a) 0.0172 (b) 0.172 (c) 1.72 (d) 0.00172
  11. 11.0.16 × 2 — where does the decimal point go? (a) 0.32 (b) 3.2 (c) 0.032 (d) 0.0032
  12. 12.3.3 × 6 — where does the decimal point go? (a) 19.8 (b) 198 (c) 1.98 (d) 0.198
  13. 13.2.4 × 4 — where does the decimal point go? (a) 0.096 (b) 96 (c) 9.6 (d) 0.96
  14. 14.4.4 × 2.3 — where does the decimal point go? (a) 0.1012 (b) 10.12 (c) 1.012 (d) 101.2
  15. 15.3.1 × 0.8 — where does the decimal point go? (a) 0.0248 (b) 0.248 (c) 2.48 (d) 24.8
  16. 16.0.88 × 1.4 — where does the decimal point go? (a) 12.32 (b) 0.01232 (c) 1.232 (d) 0.1232
  17. 17.8.1 × 28 — where does the decimal point go? (a) 22.68 (b) 2268 (c) 226.8 (d) 2.268
  18. 18.0.69 × 0.3 — where does the decimal point go? (a) 0.207 (b) 0.0207 (c) 0.00207 (d) 2.07
  19. 19.0.61 × 0.9 — where does the decimal point go? (a) 0.549 (b) 0.0549 (c) 0.00549 (d) 5.49
  20. 20.4.6 × 46 — where does the decimal point go? (a) 21.16 (b) 2.116 (c) 2116 (d) 211.6
  21. 21.9.7 × 5 — where does the decimal point go? (a) 48.5 (b) 4.85 (c) 485 (d) 0.485
  22. 22.9.4 × 0.7 — where does the decimal point go? (a) 6.58 (b) 0.0658 (c) 0.658 (d) 65.8
  23. 23.0.22 × 43 — where does the decimal point go? (a) 94.6 (b) 0.946 (c) 9.46 (d) 0.0946
  24. 24.6.9 × 0.9 — where does the decimal point go? (a) 6.21 (b) 62.1 (c) 0.621 (d) 0.0621
  25. 25.0.69 × 36 — where does the decimal point go? (a) 0.2484 (b) 248.4 (c) 2.484 (d) 24.84
  26. 26.4.3 × 3.4 — where does the decimal point go? (a) 14.62 (b) 1.462 (c) 146.2 (d) 0.1462
  27. 27.9.3 × 0.8 — where does the decimal point go? (a) 74.4 (b) 7.44 (c) 0.744 (d) 0.0744
  28. 28.0.16 × 9 — where does the decimal point go? (a) 0.144 (b) 1.44 (c) 0.0144 (d) 14.4
  29. 29.2.3 × 8 — where does the decimal point go? (a) 1.84 (b) 0.184 (c) 18.4 (d) 184
  30. 30.6.9 × 4 — where does the decimal point go? (a) 27.6 (b) 0.276 (c) 2.76 (d) 276
  31. 31.6.2 × 18 — where does the decimal point go? (a) 1.116 (b) 11.16 (c) 111.6 (d) 1116
  32. 32.7.2 × 0.6 — where does the decimal point go? (a) 43.2 (b) 4.32 (c) 0.432 (d) 0.0432
  33. 33.0.74 × 0.3 — where does the decimal point go? (a) 0.00222 (b) 0.222 (c) 2.22 (d) 0.0222
  34. 34.0.57 × 4.8 — where does the decimal point go? (a) 0.02736 (b) 0.2736 (c) 27.36 (d) 2.736
  35. 35.3.1 × 5 — where does the decimal point go? (a) 0.155 (b) 15.5 (c) 155 (d) 1.55
  36. 36.8.2 × 49 — where does the decimal point go? (a) 40.18 (b) 4.018 (c) 4018 (d) 401.8
  37. 37.0.18 × 33 — where does the decimal point go? (a) 0.0594 (b) 0.594 (c) 5.94 (d) 59.4
  38. 38.2.8 × 3 — where does the decimal point go? (a) 8.4 (b) 0.84 (c) 0.084 (d) 84
  39. 39.5.7 × 8 — where does the decimal point go? (a) 45.6 (b) 456 (c) 0.456 (d) 4.56
  40. 40.6.7 × 8 — where does the decimal point go? (a) 53.6 (b) 536 (c) 0.536 (d) 5.36

Answer key

  1. 1.98
  2. 17.7
  3. 0.65
  4. 8.48
  5. 1.188
  6. 16.56
  7. 5.64
  8. 3.48
  9. 3.54
  10. 0.172
  11. 0.32
  12. 19.8
  13. 9.6
  14. 10.12
  15. 2.48
  16. 1.232
  17. 226.8
  18. 0.207
  19. 0.549
  20. 211.6
  21. 48.5
  22. 6.58
  23. 9.46
  24. 6.21
  25. 24.84
  26. 14.62
  27. 7.44
  28. 1.44
  29. 18.4
  30. 27.6
  31. 111.6
  32. 4.32
  33. 0.222
  34. 2.736
  35. 15.5
  36. 401.8
  37. 5.94
  38. 8.4
  39. 45.6
  40. 53.6

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