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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 869 · 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. 1.0.49 × 4 — where does the decimal point go? (a) 0.0196 (b) 0.196 (c) 19.6 (d) 1.96
  2. 2.3.4 × 0.9 — where does the decimal point go? (a) 3.06 (b) 0.306 (c) 0.0306 (d) 30.6
  3. 3.9.8 × 1.1 — where does the decimal point go? (a) 107.8 (b) 1.078 (c) 0.1078 (d) 10.78
  4. 4.0.19 × 0.2 — where does the decimal point go? (a) 0.38 (b) 0.00038 (c) 0.0038 (d) 0.038
  5. 5.0.71 × 2 — where does the decimal point go? (a) 14.2 (b) 0.0142 (c) 1.42 (d) 0.142
  6. 6.9.3 × 4.6 — where does the decimal point go? (a) 0.4278 (b) 4.278 (c) 427.8 (d) 42.78
  7. 7.0.33 × 38 — where does the decimal point go? (a) 12.54 (b) 0.1254 (c) 1.254 (d) 125.4
  8. 8.0.71 × 24 — where does the decimal point go? (a) 1.704 (b) 0.1704 (c) 17.04 (d) 170.4
  9. 9.0.57 × 2.1 — where does the decimal point go? (a) 0.1197 (b) 0.01197 (c) 11.97 (d) 1.197
  10. 10.0.44 × 38 — where does the decimal point go? (a) 0.1672 (b) 16.72 (c) 1.672 (d) 167.2
  11. 11.5.6 × 0.4 — where does the decimal point go? (a) 0.0224 (b) 2.24 (c) 0.224 (d) 22.4
  12. 12.0.57 × 9 — where does the decimal point go? (a) 0.0513 (b) 0.513 (c) 5.13 (d) 51.3
  13. 13.9.5 × 3 — where does the decimal point go? (a) 28.5 (b) 285 (c) 2.85 (d) 0.285
  14. 14.0.55 × 27 — where does the decimal point go? (a) 0.1485 (b) 1.485 (c) 148.5 (d) 14.85
  15. 15.0.71 × 32 — where does the decimal point go? (a) 22.72 (b) 2.272 (c) 0.2272 (d) 227.2
  16. 16.5.6 × 38 — where does the decimal point go? (a) 21.28 (b) 2.128 (c) 212.8 (d) 2128
  17. 17.0.51 × 3 — where does the decimal point go? (a) 0.0153 (b) 1.53 (c) 0.153 (d) 15.3
  18. 18.0.92 × 0.3 — where does the decimal point go? (a) 0.00276 (b) 2.76 (c) 0.0276 (d) 0.276
  19. 19.0.12 × 0.9 — where does the decimal point go? (a) 0.0108 (b) 0.00108 (c) 0.108 (d) 1.08
  20. 20.0.47 × 4 — where does the decimal point go? (a) 0.188 (b) 0.0188 (c) 1.88 (d) 18.8
  21. 21.0.62 × 0.4 — where does the decimal point go? (a) 0.248 (b) 0.00248 (c) 0.0248 (d) 2.48
  22. 22.5.1 × 2.9 — where does the decimal point go? (a) 1.479 (b) 14.79 (c) 0.1479 (d) 147.9
  23. 23.1.4 × 28 — where does the decimal point go? (a) 39.2 (b) 0.392 (c) 3.92 (d) 392
  24. 24.0.99 × 0.7 — where does the decimal point go? (a) 0.00693 (b) 6.93 (c) 0.693 (d) 0.0693
  25. 25.0.74 × 0.7 — where does the decimal point go? (a) 0.00518 (b) 5.18 (c) 0.518 (d) 0.0518
  26. 26.0.28 × 21 — where does the decimal point go? (a) 0.588 (b) 58.8 (c) 5.88 (d) 0.0588
  27. 27.7.7 × 0.8 — where does the decimal point go? (a) 61.6 (b) 0.0616 (c) 0.616 (d) 6.16
  28. 28.2.9 × 3 — where does the decimal point go? (a) 87 (b) 8.7 (c) 0.87 (d) 0.087
  29. 29.3.6 × 46 — where does the decimal point go? (a) 1.656 (b) 165.6 (c) 1656 (d) 16.56
  30. 30.0.51 × 0.2 — where does the decimal point go? (a) 0.00102 (b) 0.0102 (c) 0.102 (d) 1.02
  31. 31.5.1 × 3.2 — where does the decimal point go? (a) 16.32 (b) 1.632 (c) 0.1632 (d) 163.2
  32. 32.8.7 × 2 — where does the decimal point go? (a) 1.74 (b) 0.174 (c) 174 (d) 17.4
  33. 33.0.96 × 4.8 — where does the decimal point go? (a) 0.04608 (b) 0.4608 (c) 46.08 (d) 4.608
  34. 34.3.4 × 42 — where does the decimal point go? (a) 142.8 (b) 14.28 (c) 1428 (d) 1.428
  35. 35.0.63 × 47 — where does the decimal point go? (a) 29.61 (b) 296.1 (c) 0.2961 (d) 2.961
  36. 36.5.1 × 6 — where does the decimal point go? (a) 30.6 (b) 0.306 (c) 3.06 (d) 306
  37. 37.1.3 × 9 — where does the decimal point go? (a) 0.117 (b) 11.7 (c) 1.17 (d) 117
  38. 38.0.26 × 0.8 — where does the decimal point go? (a) 0.0208 (b) 2.08 (c) 0.00208 (d) 0.208
  39. 39.0.58 × 3.9 — where does the decimal point go? (a) 2.262 (b) 0.02262 (c) 0.2262 (d) 22.62
  40. 40.3.2 × 31 — where does the decimal point go? (a) 9.92 (b) 0.992 (c) 992 (d) 99.2

Answer key

  1. 1.96
  2. 3.06
  3. 10.78
  4. 0.038
  5. 1.42
  6. 42.78
  7. 12.54
  8. 17.04
  9. 1.197
  10. 16.72
  11. 2.24
  12. 5.13
  13. 28.5
  14. 14.85
  15. 22.72
  16. 212.8
  17. 1.53
  18. 0.276
  19. 0.108
  20. 1.88
  21. 0.248
  22. 14.79
  23. 39.2
  24. 0.693
  25. 0.518
  26. 5.88
  27. 6.16
  28. 8.7
  29. 165.6
  30. 0.102
  31. 16.32
  32. 17.4
  33. 4.608
  34. 142.8
  35. 29.61
  36. 30.6
  37. 11.7
  38. 0.208
  39. 2.262
  40. 99.2

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