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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 199 · 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. 1.6.9 × 2.2 — where does the decimal point go? (a) 151.8 (b) 1.518 (c) 0.1518 (d) 15.18
  2. 2.0.81 × 0.2 — where does the decimal point go? (a) 0.162 (b) 0.00162 (c) 0.0162 (d) 1.62
  3. 3.0.87 × 0.2 — where does the decimal point go? (a) 0.00174 (b) 0.174 (c) 1.74 (d) 0.0174
  4. 4.1.2 × 41 — where does the decimal point go? (a) 4.92 (b) 492 (c) 49.2 (d) 0.492
  5. 5.0.69 × 4 — where does the decimal point go? (a) 2.76 (b) 0.0276 (c) 0.276 (d) 27.6
  6. 6.1.6 × 6 — where does the decimal point go? (a) 96 (b) 9.6 (c) 0.96 (d) 0.096
  7. 7.1.7 × 1.3 — where does the decimal point go? (a) 22.1 (b) 0.221 (c) 0.0221 (d) 2.21
  8. 8.6.9 × 5 — where does the decimal point go? (a) 3.45 (b) 0.345 (c) 345 (d) 34.5
  9. 9.0.99 × 4 — where does the decimal point go? (a) 39.6 (b) 0.396 (c) 3.96 (d) 0.0396
  10. 10.9.1 × 7 — where does the decimal point go? (a) 6.37 (b) 63.7 (c) 0.637 (d) 637
  11. 11.6.9 × 3.3 — where does the decimal point go? (a) 227.7 (b) 2.277 (c) 22.77 (d) 0.2277
  12. 12.4.4 × 1.4 — where does the decimal point go? (a) 0.0616 (b) 0.616 (c) 61.6 (d) 6.16
  13. 13.0.67 × 18 — where does the decimal point go? (a) 12.06 (b) 1.206 (c) 0.1206 (d) 120.6
  14. 14.0.93 × 18 — where does the decimal point go? (a) 167.4 (b) 0.1674 (c) 1.674 (d) 16.74
  15. 15.3.8 × 49 — where does the decimal point go? (a) 18.62 (b) 186.2 (c) 1862 (d) 1.862
  16. 16.1.7 × 4.5 — where does the decimal point go? (a) 0.765 (b) 76.5 (c) 7.65 (d) 0.0765
  17. 17.0.82 × 2 — where does the decimal point go? (a) 0.0164 (b) 16.4 (c) 0.164 (d) 1.64
  18. 18.1.3 × 7 — where does the decimal point go? (a) 9.1 (b) 0.091 (c) 0.91 (d) 91
  19. 19.0.96 × 0.9 — where does the decimal point go? (a) 0.864 (b) 0.0864 (c) 0.00864 (d) 8.64
  20. 20.0.27 × 18 — where does the decimal point go? (a) 0.486 (b) 48.6 (c) 0.0486 (d) 4.86
  21. 21.3.4 × 21 — where does the decimal point go? (a) 7.14 (b) 714 (c) 0.714 (d) 71.4
  22. 22.7.2 × 33 — where does the decimal point go? (a) 2376 (b) 23.76 (c) 237.6 (d) 2.376
  23. 23.9.2 × 0.8 — where does the decimal point go? (a) 73.6 (b) 0.736 (c) 0.0736 (d) 7.36
  24. 24.4.7 × 4 — where does the decimal point go? (a) 18.8 (b) 188 (c) 0.188 (d) 1.88
  25. 25.6.9 × 1.7 — where does the decimal point go? (a) 117.3 (b) 0.1173 (c) 11.73 (d) 1.173
  26. 26.6.7 × 0.3 — where does the decimal point go? (a) 20.1 (b) 0.201 (c) 2.01 (d) 0.0201
  27. 27.0.97 × 45 — where does the decimal point go? (a) 0.4365 (b) 4.365 (c) 43.65 (d) 436.5
  28. 28.2.3 × 1.8 — where does the decimal point go? (a) 0.0414 (b) 4.14 (c) 41.4 (d) 0.414
  29. 29.0.83 × 5 — where does the decimal point go? (a) 4.15 (b) 0.0415 (c) 0.415 (d) 41.5
  30. 30.0.29 × 4.4 — where does the decimal point go? (a) 1.276 (b) 0.1276 (c) 12.76 (d) 0.01276
  31. 31.6.9 × 22 — where does the decimal point go? (a) 1.518 (b) 15.18 (c) 151.8 (d) 1518
  32. 32.0.68 × 24 — where does the decimal point go? (a) 1.632 (b) 0.1632 (c) 16.32 (d) 163.2
  33. 33.2.8 × 36 — where does the decimal point go? (a) 1.008 (b) 10.08 (c) 100.8 (d) 1008
  34. 34.0.76 × 3 — where does the decimal point go? (a) 0.0228 (b) 22.8 (c) 0.228 (d) 2.28
  35. 35.0.17 × 4 — where does the decimal point go? (a) 6.8 (b) 0.68 (c) 0.068 (d) 0.0068
  36. 36.2.2 × 3 — where does the decimal point go? (a) 6.6 (b) 0.066 (c) 66 (d) 0.66
  37. 37.8.6 × 33 — where does the decimal point go? (a) 28.38 (b) 2838 (c) 283.8 (d) 2.838
  38. 38.0.98 × 4.2 — where does the decimal point go? (a) 4.116 (b) 0.4116 (c) 41.16 (d) 0.04116
  39. 39.2.3 × 35 — where does the decimal point go? (a) 8.05 (b) 80.5 (c) 0.805 (d) 805
  40. 40.0.44 × 4.6 — where does the decimal point go? (a) 0.02024 (b) 0.2024 (c) 2.024 (d) 20.24

Answer key

  1. 15.18
  2. 0.162
  3. 0.174
  4. 49.2
  5. 2.76
  6. 9.6
  7. 2.21
  8. 34.5
  9. 3.96
  10. 63.7
  11. 22.77
  12. 6.16
  13. 12.06
  14. 16.74
  15. 186.2
  16. 7.65
  17. 1.64
  18. 9.1
  19. 0.864
  20. 4.86
  21. 71.4
  22. 237.6
  23. 7.36
  24. 18.8
  25. 11.73
  26. 2.01
  27. 43.65
  28. 4.14
  29. 4.15
  30. 1.276
  31. 151.8
  32. 16.32
  33. 100.8
  34. 2.28
  35. 0.68
  36. 6.6
  37. 283.8
  38. 4.116
  39. 80.5
  40. 2.024

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