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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 966 · 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. 1.0.51 × 0.9 — where does the decimal point go? (a) 0.0459 (b) 4.59 (c) 0.00459 (d) 0.459
  2. 2.0.29 × 2.5 — where does the decimal point go? (a) 0.725 (b) 0.0725 (c) 7.25 (d) 0.00725
  3. 3.0.52 × 11 — where does the decimal point go? (a) 57.2 (b) 5.72 (c) 0.0572 (d) 0.572
  4. 4.3.4 × 38 — where does the decimal point go? (a) 12.92 (b) 1292 (c) 1.292 (d) 129.2
  5. 5.3.2 × 2 — where does the decimal point go? (a) 0.64 (b) 0.064 (c) 6.4 (d) 64
  6. 6.0.77 × 1.1 — where does the decimal point go? (a) 0.847 (b) 0.0847 (c) 8.47 (d) 0.00847
  7. 7.0.21 × 0.3 — where does the decimal point go? (a) 0.063 (b) 0.00063 (c) 0.0063 (d) 0.63
  8. 8.0.73 × 22 — where does the decimal point go? (a) 0.1606 (b) 1.606 (c) 160.6 (d) 16.06
  9. 9.3.4 × 4.1 — where does the decimal point go? (a) 0.1394 (b) 13.94 (c) 1.394 (d) 139.4
  10. 10.6.9 × 1.1 — where does the decimal point go? (a) 0.0759 (b) 75.9 (c) 7.59 (d) 0.759
  11. 11.8.8 × 8 — where does the decimal point go? (a) 704 (b) 7.04 (c) 0.704 (d) 70.4
  12. 12.5.8 × 6 — where does the decimal point go? (a) 3.48 (b) 34.8 (c) 348 (d) 0.348
  13. 13.3.3 × 0.5 — where does the decimal point go? (a) 0.0165 (b) 1.65 (c) 0.165 (d) 16.5
  14. 14.4.9 × 4 — where does the decimal point go? (a) 1.96 (b) 19.6 (c) 196 (d) 0.196
  15. 15.1.7 × 3 — where does the decimal point go? (a) 0.51 (b) 5.1 (c) 51 (d) 0.051
  16. 16.5.8 × 3.4 — where does the decimal point go? (a) 1.972 (b) 19.72 (c) 0.1972 (d) 197.2
  17. 17.0.57 × 42 — where does the decimal point go? (a) 2.394 (b) 23.94 (c) 0.2394 (d) 239.4
  18. 18.5.7 × 4 — where does the decimal point go? (a) 22.8 (b) 2.28 (c) 0.228 (d) 228
  19. 19.0.28 × 0.7 — where does the decimal point go? (a) 0.196 (b) 0.0196 (c) 1.96 (d) 0.00196
  20. 20.0.57 × 32 — where does the decimal point go? (a) 0.1824 (b) 18.24 (c) 182.4 (d) 1.824
  21. 21.7.4 × 7 — where does the decimal point go? (a) 518 (b) 0.518 (c) 51.8 (d) 5.18
  22. 22.5.4 × 3.4 — where does the decimal point go? (a) 0.1836 (b) 1.836 (c) 183.6 (d) 18.36
  23. 23.8.8 × 31 — where does the decimal point go? (a) 2.728 (b) 272.8 (c) 2728 (d) 27.28
  24. 24.2.3 × 16 — where does the decimal point go? (a) 36.8 (b) 0.368 (c) 3.68 (d) 368
  25. 25.2.5 × 0.9 — where does the decimal point go? (a) 22.5 (b) 0.0225 (c) 2.25 (d) 0.225
  26. 26.2.1 × 0.9 — where does the decimal point go? (a) 1.89 (b) 0.0189 (c) 18.9 (d) 0.189
  27. 27.2.3 × 8 — where does the decimal point go? (a) 18.4 (b) 1.84 (c) 184 (d) 0.184
  28. 28.2.1 × 48 — where does the decimal point go? (a) 1008 (b) 10.08 (c) 100.8 (d) 1.008
  29. 29.0.98 × 37 — where does the decimal point go? (a) 36.26 (b) 3.626 (c) 0.3626 (d) 362.6
  30. 30.1.2 × 12 — where does the decimal point go? (a) 0.144 (b) 14.4 (c) 144 (d) 1.44
  31. 31.0.56 × 6 — where does the decimal point go? (a) 33.6 (b) 0.0336 (c) 3.36 (d) 0.336
  32. 32.0.72 × 2 — where does the decimal point go? (a) 14.4 (b) 0.0144 (c) 0.144 (d) 1.44
  33. 33.0.31 × 18 — where does the decimal point go? (a) 5.58 (b) 0.558 (c) 0.0558 (d) 55.8
  34. 34.0.27 × 1.1 — where does the decimal point go? (a) 0.0297 (b) 0.297 (c) 2.97 (d) 0.00297
  35. 35.8.1 × 46 — where does the decimal point go? (a) 3.726 (b) 372.6 (c) 3726 (d) 37.26
  36. 36.0.77 × 6 — where does the decimal point go? (a) 46.2 (b) 0.0462 (c) 0.462 (d) 4.62
  37. 37.1.4 × 6 — where does the decimal point go? (a) 0.84 (b) 0.084 (c) 84 (d) 8.4
  38. 38.0.19 × 17 — where does the decimal point go? (a) 0.323 (b) 3.23 (c) 0.0323 (d) 32.3
  39. 39.7.1 × 0.5 — where does the decimal point go? (a) 0.0355 (b) 0.355 (c) 35.5 (d) 3.55
  40. 40.0.94 × 8 — where does the decimal point go? (a) 0.752 (b) 0.0752 (c) 7.52 (d) 75.2

Answer key

  1. 0.459
  2. 0.725
  3. 5.72
  4. 129.2
  5. 6.4
  6. 0.847
  7. 0.063
  8. 16.06
  9. 13.94
  10. 7.59
  11. 70.4
  12. 34.8
  13. 1.65
  14. 19.6
  15. 5.1
  16. 19.72
  17. 23.94
  18. 22.8
  19. 0.196
  20. 18.24
  21. 51.8
  22. 18.36
  23. 272.8
  24. 36.8
  25. 2.25
  26. 1.89
  27. 18.4
  28. 100.8
  29. 36.26
  30. 14.4
  31. 3.36
  32. 1.44
  33. 5.58
  34. 0.297
  35. 372.6
  36. 4.62
  37. 8.4
  38. 3.23
  39. 3.55
  40. 7.52

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