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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 879 · 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. 1.5.5 × 0.5 — where does the decimal point go? (a) 2.75 (b) 0.0275 (c) 27.5 (d) 0.275
  2. 2.7.2 × 9 — where does the decimal point go? (a) 6.48 (b) 648 (c) 0.648 (d) 64.8
  3. 3.7.3 × 0.8 — where does the decimal point go? (a) 5.84 (b) 0.584 (c) 58.4 (d) 0.0584
  4. 4.0.43 × 19 — where does the decimal point go? (a) 0.817 (b) 0.0817 (c) 8.17 (d) 81.7
  5. 5.8.5 × 0.5 — where does the decimal point go? (a) 0.425 (b) 4.25 (c) 42.5 (d) 0.0425
  6. 6.0.51 × 28 — where does the decimal point go? (a) 14.28 (b) 1.428 (c) 142.8 (d) 0.1428
  7. 7.0.32 × 8 — where does the decimal point go? (a) 0.256 (b) 25.6 (c) 2.56 (d) 0.0256
  8. 8.0.73 × 2 — where does the decimal point go? (a) 1.46 (b) 14.6 (c) 0.0146 (d) 0.146
  9. 9.1.2 × 6 — where does the decimal point go? (a) 7.2 (b) 72 (c) 0.072 (d) 0.72
  10. 10.0.22 × 0.2 — where does the decimal point go? (a) 0.044 (b) 0.00044 (c) 0.0044 (d) 0.44
  11. 11.8.2 × 4.3 — where does the decimal point go? (a) 0.3526 (b) 35.26 (c) 3.526 (d) 352.6
  12. 12.0.24 × 7 — where does the decimal point go? (a) 0.168 (b) 1.68 (c) 0.0168 (d) 16.8
  13. 13.0.91 × 1.8 — where does the decimal point go? (a) 0.01638 (b) 1.638 (c) 16.38 (d) 0.1638
  14. 14.6.2 × 1.3 — where does the decimal point go? (a) 8.06 (b) 0.806 (c) 0.0806 (d) 80.6
  15. 15.2.9 × 0.2 — where does the decimal point go? (a) 0.58 (b) 5.8 (c) 0.058 (d) 0.0058
  16. 16.0.26 × 0.9 — where does the decimal point go? (a) 0.00234 (b) 2.34 (c) 0.0234 (d) 0.234
  17. 17.0.59 × 5 — where does the decimal point go? (a) 0.0295 (b) 2.95 (c) 0.295 (d) 29.5
  18. 18.1.2 × 1.8 — where does the decimal point go? (a) 21.6 (b) 0.0216 (c) 0.216 (d) 2.16
  19. 19.6.4 × 8 — where does the decimal point go? (a) 51.2 (b) 0.512 (c) 5.12 (d) 512
  20. 20.6.2 × 4 — where does the decimal point go? (a) 24.8 (b) 2.48 (c) 0.248 (d) 248
  21. 21.4.5 × 3 — where does the decimal point go? (a) 1.35 (b) 13.5 (c) 135 (d) 0.135
  22. 22.0.58 × 3 — where does the decimal point go? (a) 0.0174 (b) 0.174 (c) 1.74 (d) 17.4
  23. 23.8.7 × 36 — where does the decimal point go? (a) 31.32 (b) 313.2 (c) 3132 (d) 3.132
  24. 24.0.19 × 0.4 — where does the decimal point go? (a) 0.0076 (b) 0.00076 (c) 0.076 (d) 0.76
  25. 25.5.8 × 3 — where does the decimal point go? (a) 0.174 (b) 1.74 (c) 17.4 (d) 174
  26. 26.2.4 × 4 — where does the decimal point go? (a) 9.6 (b) 96 (c) 0.96 (d) 0.096
  27. 27.1.4 × 0.8 — where does the decimal point go? (a) 11.2 (b) 0.0112 (c) 1.12 (d) 0.112
  28. 28.6.4 × 6 — where does the decimal point go? (a) 384 (b) 3.84 (c) 0.384 (d) 38.4
  29. 29.4.2 × 4 — where does the decimal point go? (a) 0.168 (b) 168 (c) 16.8 (d) 1.68
  30. 30.9.6 × 3 — where does the decimal point go? (a) 288 (b) 28.8 (c) 0.288 (d) 2.88
  31. 31.0.86 × 2.7 — where does the decimal point go? (a) 23.22 (b) 0.02322 (c) 0.2322 (d) 2.322
  32. 32.3.2 × 22 — where does the decimal point go? (a) 7.04 (b) 70.4 (c) 0.704 (d) 704
  33. 33.0.54 × 0.3 — where does the decimal point go? (a) 0.162 (b) 1.62 (c) 0.0162 (d) 0.00162
  34. 34.0.18 × 0.6 — where does the decimal point go? (a) 1.08 (b) 0.00108 (c) 0.0108 (d) 0.108
  35. 35.1.9 × 0.2 — where does the decimal point go? (a) 3.8 (b) 0.0038 (c) 0.038 (d) 0.38
  36. 36.9.7 × 0.9 — where does the decimal point go? (a) 0.0873 (b) 8.73 (c) 87.3 (d) 0.873
  37. 37.1.9 × 2.2 — where does the decimal point go? (a) 41.8 (b) 0.0418 (c) 0.418 (d) 4.18
  38. 38.8.6 × 2 — where does the decimal point go? (a) 1.72 (b) 17.2 (c) 0.172 (d) 172
  39. 39.0.48 × 7 — where does the decimal point go? (a) 33.6 (b) 0.0336 (c) 3.36 (d) 0.336
  40. 40.9.2 × 3.3 — where does the decimal point go? (a) 3.036 (b) 30.36 (c) 0.3036 (d) 303.6

Answer key

  1. 2.75
  2. 64.8
  3. 5.84
  4. 8.17
  5. 4.25
  6. 14.28
  7. 2.56
  8. 1.46
  9. 7.2
  10. 0.044
  11. 35.26
  12. 1.68
  13. 1.638
  14. 8.06
  15. 0.58
  16. 0.234
  17. 2.95
  18. 2.16
  19. 51.2
  20. 24.8
  21. 13.5
  22. 1.74
  23. 313.2
  24. 0.076
  25. 17.4
  26. 9.6
  27. 1.12
  28. 38.4
  29. 16.8
  30. 28.8
  31. 2.322
  32. 70.4
  33. 0.162
  34. 0.108
  35. 0.38
  36. 8.73
  37. 4.18
  38. 17.2
  39. 3.36
  40. 30.36

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