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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 82 · 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. 1.9.4 × 1.1 — where does the decimal point go? (a) 1.034 (b) 0.1034 (c) 103.4 (d) 10.34
  2. 2.6.9 × 16 — where does the decimal point go? (a) 1.104 (b) 110.4 (c) 11.04 (d) 1104
  3. 3.1.3 × 0.9 — where does the decimal point go? (a) 11.7 (b) 1.17 (c) 0.0117 (d) 0.117
  4. 4.0.74 × 2 — where does the decimal point go? (a) 0.148 (b) 1.48 (c) 14.8 (d) 0.0148
  5. 5.0.19 × 0.7 — where does the decimal point go? (a) 0.0133 (b) 0.00133 (c) 1.33 (d) 0.133
  6. 6.5.6 × 2 — where does the decimal point go? (a) 11.2 (b) 0.112 (c) 1.12 (d) 112
  7. 7.5.4 × 0.3 — where does the decimal point go? (a) 1.62 (b) 0.0162 (c) 16.2 (d) 0.162
  8. 8.2.4 × 0.9 — where does the decimal point go? (a) 2.16 (b) 0.216 (c) 21.6 (d) 0.0216
  9. 9.0.86 × 3 — where does the decimal point go? (a) 0.258 (b) 2.58 (c) 25.8 (d) 0.0258
  10. 10.2.2 × 0.7 — where does the decimal point go? (a) 0.0154 (b) 0.154 (c) 1.54 (d) 15.4
  11. 11.2.6 × 9 — where does the decimal point go? (a) 2.34 (b) 234 (c) 0.234 (d) 23.4
  12. 12.1.6 × 8 — where does the decimal point go? (a) 128 (b) 1.28 (c) 0.128 (d) 12.8
  13. 13.0.62 × 8 — where does the decimal point go? (a) 4.96 (b) 49.6 (c) 0.0496 (d) 0.496
  14. 14.0.77 × 16 — where does the decimal point go? (a) 0.1232 (b) 123.2 (c) 12.32 (d) 1.232
  15. 15.8.8 × 0.2 — where does the decimal point go? (a) 0.176 (b) 1.76 (c) 0.0176 (d) 17.6
  16. 16.2.1 × 0.3 — where does the decimal point go? (a) 0.063 (b) 6.3 (c) 0.63 (d) 0.0063
  17. 17.0.82 × 49 — where does the decimal point go? (a) 4.018 (b) 0.4018 (c) 40.18 (d) 401.8
  18. 18.0.99 × 0.4 — where does the decimal point go? (a) 0.0396 (b) 0.396 (c) 3.96 (d) 0.00396
  19. 19.0.13 × 9 — where does the decimal point go? (a) 0.117 (b) 1.17 (c) 11.7 (d) 0.0117
  20. 20.9.6 × 9 — where does the decimal point go? (a) 0.864 (b) 864 (c) 8.64 (d) 86.4
  21. 21.0.98 × 33 — where does the decimal point go? (a) 32.34 (b) 3.234 (c) 323.4 (d) 0.3234
  22. 22.0.63 × 0.3 — where does the decimal point go? (a) 1.89 (b) 0.189 (c) 0.00189 (d) 0.0189
  23. 23.6.9 × 35 — where does the decimal point go? (a) 2.415 (b) 241.5 (c) 24.15 (d) 2415
  24. 24.0.19 × 0.8 — where does the decimal point go? (a) 0.0152 (b) 0.00152 (c) 0.152 (d) 1.52
  25. 25.1.9 × 6 — where does the decimal point go? (a) 11.4 (b) 0.114 (c) 1.14 (d) 114
  26. 26.2.2 × 0.9 — where does the decimal point go? (a) 1.98 (b) 19.8 (c) 0.198 (d) 0.0198
  27. 27.2.1 × 1.6 — where does the decimal point go? (a) 0.336 (b) 33.6 (c) 0.0336 (d) 3.36
  28. 28.9.7 × 4 — where does the decimal point go? (a) 38.8 (b) 388 (c) 0.388 (d) 3.88
  29. 29.0.99 × 32 — where does the decimal point go? (a) 31.68 (b) 0.3168 (c) 3.168 (d) 316.8
  30. 30.0.91 × 5 — where does the decimal point go? (a) 45.5 (b) 0.0455 (c) 4.55 (d) 0.455
  31. 31.8.8 × 1.9 — where does the decimal point go? (a) 16.72 (b) 0.1672 (c) 1.672 (d) 167.2
  32. 32.7.1 × 44 — where does the decimal point go? (a) 3124 (b) 3.124 (c) 312.4 (d) 31.24
  33. 33.2.9 × 0.7 — where does the decimal point go? (a) 2.03 (b) 20.3 (c) 0.203 (d) 0.0203
  34. 34.0.78 × 6 — where does the decimal point go? (a) 46.8 (b) 0.0468 (c) 0.468 (d) 4.68
  35. 35.1.9 × 8 — where does the decimal point go? (a) 1.52 (b) 15.2 (c) 152 (d) 0.152
  36. 36.3.8 × 1.4 — where does the decimal point go? (a) 5.32 (b) 53.2 (c) 0.0532 (d) 0.532
  37. 37.7.9 × 38 — where does the decimal point go? (a) 30.02 (b) 3002 (c) 300.2 (d) 3.002
  38. 38.0.91 × 0.7 — where does the decimal point go? (a) 0.00637 (b) 6.37 (c) 0.637 (d) 0.0637
  39. 39.0.74 × 0.6 — where does the decimal point go? (a) 0.00444 (b) 0.444 (c) 4.44 (d) 0.0444
  40. 40.0.83 × 0.5 — where does the decimal point go? (a) 0.00415 (b) 0.0415 (c) 4.15 (d) 0.415

Answer key

  1. 10.34
  2. 110.4
  3. 1.17
  4. 1.48
  5. 0.133
  6. 11.2
  7. 1.62
  8. 2.16
  9. 2.58
  10. 1.54
  11. 23.4
  12. 12.8
  13. 4.96
  14. 12.32
  15. 1.76
  16. 0.63
  17. 40.18
  18. 0.396
  19. 1.17
  20. 86.4
  21. 32.34
  22. 0.189
  23. 241.5
  24. 0.152
  25. 11.4
  26. 1.98
  27. 3.36
  28. 38.8
  29. 31.68
  30. 4.55
  31. 16.72
  32. 312.4
  33. 2.03
  34. 4.68
  35. 15.2
  36. 5.32
  37. 300.2
  38. 0.637
  39. 0.444
  40. 0.415

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