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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 548 · 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 × 2 — where does the decimal point go? (a) 0.044 (b) 0.44 (c) 44 (d) 4.4
  2. 2.7.7 × 0.9 — where does the decimal point go? (a) 0.0693 (b) 0.693 (c) 6.93 (d) 69.3
  3. 3.1.8 × 9 — where does the decimal point go? (a) 162 (b) 0.162 (c) 16.2 (d) 1.62
  4. 4.2.7 × 8 — where does the decimal point go? (a) 0.216 (b) 2.16 (c) 21.6 (d) 216
  5. 5.6.7 × 23 — where does the decimal point go? (a) 1541 (b) 1.541 (c) 154.1 (d) 15.41
  6. 6.0.97 × 3.2 — where does the decimal point go? (a) 0.3104 (b) 31.04 (c) 0.03104 (d) 3.104
  7. 7.1.2 × 11 — where does the decimal point go? (a) 132 (b) 0.132 (c) 1.32 (d) 13.2
  8. 8.4.4 × 8 — where does the decimal point go? (a) 3.52 (b) 352 (c) 35.2 (d) 0.352
  9. 9.0.71 × 3 — where does the decimal point go? (a) 0.213 (b) 21.3 (c) 0.0213 (d) 2.13
  10. 10.4.8 × 2 — where does the decimal point go? (a) 0.96 (b) 0.096 (c) 9.6 (d) 96
  11. 11.0.79 × 2 — where does the decimal point go? (a) 0.158 (b) 0.0158 (c) 15.8 (d) 1.58
  12. 12.0.24 × 2 — where does the decimal point go? (a) 0.048 (b) 4.8 (c) 0.0048 (d) 0.48
  13. 13.9.3 × 4.5 — where does the decimal point go? (a) 41.85 (b) 0.4185 (c) 418.5 (d) 4.185
  14. 14.0.65 × 11 — where does the decimal point go? (a) 0.0715 (b) 0.715 (c) 71.5 (d) 7.15
  15. 15.1.7 × 35 — where does the decimal point go? (a) 0.595 (b) 5.95 (c) 59.5 (d) 595
  16. 16.0.14 × 0.2 — where does the decimal point go? (a) 0.00028 (b) 0.028 (c) 0.0028 (d) 0.28
  17. 17.3.8 × 7 — where does the decimal point go? (a) 26.6 (b) 2.66 (c) 266 (d) 0.266
  18. 18.7.2 × 31 — where does the decimal point go? (a) 2.232 (b) 22.32 (c) 223.2 (d) 2232
  19. 19.8.4 × 6 — where does the decimal point go? (a) 0.504 (b) 5.04 (c) 50.4 (d) 504
  20. 20.3.7 × 1.3 — where does the decimal point go? (a) 0.481 (b) 4.81 (c) 0.0481 (d) 48.1
  21. 21.4.3 × 36 — where does the decimal point go? (a) 15.48 (b) 1.548 (c) 1548 (d) 154.8
  22. 22.5.6 × 42 — where does the decimal point go? (a) 2352 (b) 23.52 (c) 235.2 (d) 2.352
  23. 23.4.2 × 3.1 — where does the decimal point go? (a) 1.302 (b) 13.02 (c) 0.1302 (d) 130.2
  24. 24.3.6 × 4.8 — where does the decimal point go? (a) 0.1728 (b) 17.28 (c) 172.8 (d) 1.728
  25. 25.0.39 × 3.1 — where does the decimal point go? (a) 0.01209 (b) 12.09 (c) 0.1209 (d) 1.209
  26. 26.0.63 × 45 — where does the decimal point go? (a) 0.2835 (b) 28.35 (c) 283.5 (d) 2.835
  27. 27.1.9 × 8 — where does the decimal point go? (a) 1.52 (b) 15.2 (c) 152 (d) 0.152
  28. 28.8.4 × 0.6 — where does the decimal point go? (a) 0.504 (b) 0.0504 (c) 50.4 (d) 5.04
  29. 29.0.73 × 9 — where does the decimal point go? (a) 0.657 (b) 6.57 (c) 0.0657 (d) 65.7
  30. 30.9.9 × 0.2 — where does the decimal point go? (a) 19.8 (b) 1.98 (c) 0.198 (d) 0.0198
  31. 31.8.7 × 4.2 — where does the decimal point go? (a) 0.3654 (b) 3.654 (c) 365.4 (d) 36.54
  32. 32.3.1 × 1.8 — where does the decimal point go? (a) 5.58 (b) 0.558 (c) 0.0558 (d) 55.8
  33. 33.0.13 × 9 — where does the decimal point go? (a) 1.17 (b) 11.7 (c) 0.117 (d) 0.0117
  34. 34.9.8 × 4 — where does the decimal point go? (a) 3.92 (b) 39.2 (c) 0.392 (d) 392
  35. 35.0.22 × 8 — where does the decimal point go? (a) 17.6 (b) 1.76 (c) 0.176 (d) 0.0176
  36. 36.0.62 × 0.4 — where does the decimal point go? (a) 0.0248 (b) 0.248 (c) 0.00248 (d) 2.48
  37. 37.3.1 × 5 — where does the decimal point go? (a) 155 (b) 15.5 (c) 0.155 (d) 1.55
  38. 38.0.16 × 0.3 — where does the decimal point go? (a) 0.48 (b) 0.048 (c) 0.00048 (d) 0.0048
  39. 39.0.83 × 4 — where does the decimal point go? (a) 0.332 (b) 33.2 (c) 0.0332 (d) 3.32
  40. 40.0.93 × 9 — where does the decimal point go? (a) 0.837 (b) 83.7 (c) 0.0837 (d) 8.37

Answer key

  1. 4.4
  2. 6.93
  3. 16.2
  4. 21.6
  5. 154.1
  6. 3.104
  7. 13.2
  8. 35.2
  9. 2.13
  10. 9.6
  11. 1.58
  12. 0.48
  13. 41.85
  14. 7.15
  15. 59.5
  16. 0.028
  17. 26.6
  18. 223.2
  19. 50.4
  20. 4.81
  21. 154.8
  22. 235.2
  23. 13.02
  24. 17.28
  25. 1.209
  26. 28.35
  27. 15.2
  28. 5.04
  29. 6.57
  30. 1.98
  31. 36.54
  32. 5.58
  33. 1.17
  34. 39.2
  35. 1.76
  36. 0.248
  37. 15.5
  38. 0.048
  39. 3.32
  40. 8.37

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