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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 123 · 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. 1.4.2 × 2.1 — where does the decimal point go? (a) 88.2 (b) 0.882 (c) 8.82 (d) 0.0882
  2. 2.3.2 × 8 — where does the decimal point go? (a) 25.6 (b) 256 (c) 0.256 (d) 2.56
  3. 3.8.6 × 0.3 — where does the decimal point go? (a) 2.58 (b) 0.0258 (c) 25.8 (d) 0.258
  4. 4.4.2 × 0.7 — where does the decimal point go? (a) 0.294 (b) 2.94 (c) 0.0294 (d) 29.4
  5. 5.5.7 × 8 — where does the decimal point go? (a) 45.6 (b) 456 (c) 4.56 (d) 0.456
  6. 6.3.7 × 0.2 — where does the decimal point go? (a) 0.074 (b) 0.74 (c) 0.0074 (d) 7.4
  7. 7.8.6 × 8 — where does the decimal point go? (a) 6.88 (b) 0.688 (c) 68.8 (d) 688
  8. 8.3.3 × 2 — where does the decimal point go? (a) 6.6 (b) 66 (c) 0.066 (d) 0.66
  9. 9.9.8 × 3 — where does the decimal point go? (a) 2.94 (b) 0.294 (c) 294 (d) 29.4
  10. 10.0.96 × 0.8 — where does the decimal point go? (a) 7.68 (b) 0.0768 (c) 0.00768 (d) 0.768
  11. 11.3.8 × 3 — where does the decimal point go? (a) 11.4 (b) 114 (c) 0.114 (d) 1.14
  12. 12.1.2 × 7 — where does the decimal point go? (a) 8.4 (b) 0.84 (c) 0.084 (d) 84
  13. 13.3.4 × 4 — where does the decimal point go? (a) 13.6 (b) 136 (c) 1.36 (d) 0.136
  14. 14.0.42 × 0.6 — where does the decimal point go? (a) 0.0252 (b) 0.00252 (c) 0.252 (d) 2.52
  15. 15.0.67 × 4.6 — where does the decimal point go? (a) 3.082 (b) 0.03082 (c) 30.82 (d) 0.3082
  16. 16.0.65 × 23 — where does the decimal point go? (a) 149.5 (b) 14.95 (c) 1.495 (d) 0.1495
  17. 17.4.3 × 11 — where does the decimal point go? (a) 4.73 (b) 0.473 (c) 47.3 (d) 473
  18. 18.8.1 × 23 — where does the decimal point go? (a) 1.863 (b) 1863 (c) 186.3 (d) 18.63
  19. 19.6.7 × 2 — where does the decimal point go? (a) 0.134 (b) 13.4 (c) 134 (d) 1.34
  20. 20.9.1 × 2.5 — where does the decimal point go? (a) 0.2275 (b) 2.275 (c) 22.75 (d) 227.5
  21. 21.0.51 × 0.3 — where does the decimal point go? (a) 0.0153 (b) 0.153 (c) 0.00153 (d) 1.53
  22. 22.8.3 × 2.1 — where does the decimal point go? (a) 174.3 (b) 1.743 (c) 0.1743 (d) 17.43
  23. 23.9.7 × 0.3 — where does the decimal point go? (a) 2.91 (b) 0.0291 (c) 29.1 (d) 0.291
  24. 24.0.47 × 42 — where does the decimal point go? (a) 1.974 (b) 0.1974 (c) 19.74 (d) 197.4
  25. 25.0.17 × 0.8 — where does the decimal point go? (a) 1.36 (b) 0.0136 (c) 0.136 (d) 0.00136
  26. 26.0.53 × 0.3 — where does the decimal point go? (a) 1.59 (b) 0.159 (c) 0.0159 (d) 0.00159
  27. 27.8.7 × 2.6 — where does the decimal point go? (a) 226.2 (b) 2.262 (c) 22.62 (d) 0.2262
  28. 28.9.4 × 37 — where does the decimal point go? (a) 34.78 (b) 3.478 (c) 3478 (d) 347.8
  29. 29.1.9 × 0.3 — where does the decimal point go? (a) 0.57 (b) 0.057 (c) 5.7 (d) 0.0057
  30. 30.0.43 × 0.4 — where does the decimal point go? (a) 1.72 (b) 0.172 (c) 0.0172 (d) 0.00172
  31. 31.8.5 × 9 — where does the decimal point go? (a) 7.65 (b) 76.5 (c) 0.765 (d) 765
  32. 32.0.69 × 37 — where does the decimal point go? (a) 255.3 (b) 0.2553 (c) 2.553 (d) 25.53
  33. 33.2.3 × 3 — where does the decimal point go? (a) 0.069 (b) 6.9 (c) 69 (d) 0.69
  34. 34.0.93 × 5 — where does the decimal point go? (a) 4.65 (b) 0.0465 (c) 0.465 (d) 46.5
  35. 35.3.7 × 33 — where does the decimal point go? (a) 1.221 (b) 12.21 (c) 1221 (d) 122.1
  36. 36.6.6 × 36 — where does the decimal point go? (a) 237.6 (b) 2.376 (c) 2376 (d) 23.76
  37. 37.4.8 × 32 — where does the decimal point go? (a) 1536 (b) 15.36 (c) 153.6 (d) 1.536
  38. 38.0.26 × 48 — where does the decimal point go? (a) 1.248 (b) 124.8 (c) 12.48 (d) 0.1248
  39. 39.2.1 × 0.6 — where does the decimal point go? (a) 0.0126 (b) 0.126 (c) 12.6 (d) 1.26
  40. 40.0.77 × 4 — where does the decimal point go? (a) 30.8 (b) 0.0308 (c) 0.308 (d) 3.08

Answer key

  1. 8.82
  2. 25.6
  3. 2.58
  4. 2.94
  5. 45.6
  6. 0.74
  7. 68.8
  8. 6.6
  9. 29.4
  10. 0.768
  11. 11.4
  12. 8.4
  13. 13.6
  14. 0.252
  15. 3.082
  16. 14.95
  17. 47.3
  18. 186.3
  19. 13.4
  20. 22.75
  21. 0.153
  22. 17.43
  23. 2.91
  24. 19.74
  25. 0.136
  26. 0.159
  27. 22.62
  28. 347.8
  29. 0.57
  30. 0.172
  31. 76.5
  32. 25.53
  33. 6.9
  34. 4.65
  35. 122.1
  36. 237.6
  37. 153.6
  38. 12.48
  39. 1.26
  40. 3.08

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