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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 756 · 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. 1.0.75 × 3 — where does the decimal point go? (a) 0.0225 (b) 2.25 (c) 22.5 (d) 0.225
  2. 2.2.4 × 0.6 — where does the decimal point go? (a) 0.144 (b) 1.44 (c) 14.4 (d) 0.0144
  3. 3.2.8 × 49 — where does the decimal point go? (a) 13.72 (b) 1372 (c) 1.372 (d) 137.2
  4. 4.5.2 × 13 — where does the decimal point go? (a) 67.6 (b) 6.76 (c) 676 (d) 0.676
  5. 5.3.3 × 7 — where does the decimal point go? (a) 2.31 (b) 0.231 (c) 23.1 (d) 231
  6. 6.8.1 × 46 — where does the decimal point go? (a) 37.26 (b) 3726 (c) 372.6 (d) 3.726
  7. 7.3.7 × 9 — where does the decimal point go? (a) 3.33 (b) 33.3 (c) 0.333 (d) 333
  8. 8.3.2 × 1.6 — where does the decimal point go? (a) 51.2 (b) 0.0512 (c) 0.512 (d) 5.12
  9. 9.0.89 × 15 — where does the decimal point go? (a) 13.35 (b) 133.5 (c) 1.335 (d) 0.1335
  10. 10.0.99 × 0.7 — where does the decimal point go? (a) 0.693 (b) 0.00693 (c) 6.93 (d) 0.0693
  11. 11.7.2 × 3 — where does the decimal point go? (a) 2.16 (b) 21.6 (c) 0.216 (d) 216
  12. 12.1.5 × 0.9 — where does the decimal point go? (a) 13.5 (b) 0.0135 (c) 1.35 (d) 0.135
  13. 13.0.13 × 0.8 — where does the decimal point go? (a) 0.104 (b) 1.04 (c) 0.0104 (d) 0.00104
  14. 14.0.97 × 0.5 — where does the decimal point go? (a) 0.485 (b) 0.00485 (c) 4.85 (d) 0.0485
  15. 15.9.7 × 7 — where does the decimal point go? (a) 67.9 (b) 6.79 (c) 0.679 (d) 679
  16. 16.9.4 × 4 — where does the decimal point go? (a) 3.76 (b) 376 (c) 0.376 (d) 37.6
  17. 17.0.58 × 38 — where does the decimal point go? (a) 2.204 (b) 0.2204 (c) 22.04 (d) 220.4
  18. 18.9.9 × 9 — where does the decimal point go? (a) 8.91 (b) 0.891 (c) 89.1 (d) 891
  19. 19.0.16 × 16 — where does the decimal point go? (a) 25.6 (b) 2.56 (c) 0.256 (d) 0.0256
  20. 20.9.9 × 7 — where does the decimal point go? (a) 0.693 (b) 69.3 (c) 693 (d) 6.93
  21. 21.5.3 × 3 — where does the decimal point go? (a) 15.9 (b) 0.159 (c) 159 (d) 1.59
  22. 22.0.27 × 4 — where does the decimal point go? (a) 0.0108 (b) 0.108 (c) 1.08 (d) 10.8
  23. 23.7.1 × 1.3 — where does the decimal point go? (a) 0.923 (b) 9.23 (c) 0.0923 (d) 92.3
  24. 24.8.2 × 0.3 — where does the decimal point go? (a) 0.0246 (b) 0.246 (c) 24.6 (d) 2.46
  25. 25.0.62 × 42 — where does the decimal point go? (a) 0.2604 (b) 260.4 (c) 2.604 (d) 26.04
  26. 26.2.3 × 19 — where does the decimal point go? (a) 0.437 (b) 437 (c) 43.7 (d) 4.37
  27. 27.0.54 × 2.3 — where does the decimal point go? (a) 0.1242 (b) 12.42 (c) 1.242 (d) 0.01242
  28. 28.1.9 × 3.3 — where does the decimal point go? (a) 62.7 (b) 0.0627 (c) 6.27 (d) 0.627
  29. 29.3.5 × 5 — where does the decimal point go? (a) 0.175 (b) 1.75 (c) 175 (d) 17.5
  30. 30.9.7 × 8 — where does the decimal point go? (a) 776 (b) 7.76 (c) 0.776 (d) 77.6
  31. 31.7.4 × 6 — where does the decimal point go? (a) 444 (b) 4.44 (c) 0.444 (d) 44.4
  32. 32.5.6 × 3 — where does the decimal point go? (a) 1.68 (b) 168 (c) 16.8 (d) 0.168
  33. 33.5.7 × 0.9 — where does the decimal point go? (a) 5.13 (b) 51.3 (c) 0.0513 (d) 0.513
  34. 34.7.9 × 48 — where does the decimal point go? (a) 37.92 (b) 3.792 (c) 379.2 (d) 3792
  35. 35.8.8 × 41 — where does the decimal point go? (a) 36.08 (b) 360.8 (c) 3.608 (d) 3608
  36. 36.4.4 × 29 — where does the decimal point go? (a) 1.276 (b) 1276 (c) 12.76 (d) 127.6
  37. 37.0.18 × 0.3 — where does the decimal point go? (a) 0.0054 (b) 0.00054 (c) 0.54 (d) 0.054
  38. 38.9.6 × 0.8 — where does the decimal point go? (a) 76.8 (b) 0.0768 (c) 7.68 (d) 0.768
  39. 39.9.6 × 2 — where does the decimal point go? (a) 192 (b) 0.192 (c) 1.92 (d) 19.2
  40. 40.7.8 × 14 — where does the decimal point go? (a) 1092 (b) 10.92 (c) 109.2 (d) 1.092

Answer key

  1. 2.25
  2. 1.44
  3. 137.2
  4. 67.6
  5. 23.1
  6. 372.6
  7. 33.3
  8. 5.12
  9. 13.35
  10. 0.693
  11. 21.6
  12. 1.35
  13. 0.104
  14. 0.485
  15. 67.9
  16. 37.6
  17. 22.04
  18. 89.1
  19. 2.56
  20. 69.3
  21. 15.9
  22. 1.08
  23. 9.23
  24. 2.46
  25. 26.04
  26. 43.7
  27. 1.242
  28. 6.27
  29. 17.5
  30. 77.6
  31. 44.4
  32. 16.8
  33. 5.13
  34. 379.2
  35. 360.8
  36. 127.6
  37. 0.054
  38. 7.68
  39. 19.2
  40. 109.2

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