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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 950 · 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. 1.0.59 × 0.3 — where does the decimal point go? (a) 0.177 (b) 1.77 (c) 0.0177 (d) 0.00177
  2. 2.3.3 × 6 — where does the decimal point go? (a) 1.98 (b) 19.8 (c) 0.198 (d) 198
  3. 3.0.43 × 14 — where does the decimal point go? (a) 0.602 (b) 6.02 (c) 0.0602 (d) 60.2
  4. 4.0.31 × 8 — where does the decimal point go? (a) 24.8 (b) 2.48 (c) 0.0248 (d) 0.248
  5. 5.0.41 × 0.2 — where does the decimal point go? (a) 0.00082 (b) 0.0082 (c) 0.82 (d) 0.082
  6. 6.3.3 × 1.3 — where does the decimal point go? (a) 4.29 (b) 0.0429 (c) 42.9 (d) 0.429
  7. 7.1.6 × 2.4 — where does the decimal point go? (a) 3.84 (b) 0.0384 (c) 0.384 (d) 38.4
  8. 8.0.18 × 0.2 — where does the decimal point go? (a) 0.00036 (b) 0.036 (c) 0.36 (d) 0.0036
  9. 9.0.25 × 0.9 — where does the decimal point go? (a) 0.0225 (b) 0.225 (c) 0.00225 (d) 2.25
  10. 10.0.28 × 31 — where does the decimal point go? (a) 86.8 (b) 0.0868 (c) 8.68 (d) 0.868
  11. 11.0.51 × 0.8 — where does the decimal point go? (a) 4.08 (b) 0.0408 (c) 0.00408 (d) 0.408
  12. 12.0.17 × 4 — where does the decimal point go? (a) 6.8 (b) 0.068 (c) 0.68 (d) 0.0068
  13. 13.0.32 × 0.2 — where does the decimal point go? (a) 0.0064 (b) 0.064 (c) 0.64 (d) 0.00064
  14. 14.0.46 × 0.8 — where does the decimal point go? (a) 0.00368 (b) 3.68 (c) 0.368 (d) 0.0368
  15. 15.0.91 × 47 — where does the decimal point go? (a) 427.7 (b) 4.277 (c) 0.4277 (d) 42.77
  16. 16.6.1 × 4 — where does the decimal point go? (a) 244 (b) 2.44 (c) 24.4 (d) 0.244
  17. 17.3.6 × 39 — where does the decimal point go? (a) 14.04 (b) 1.404 (c) 1404 (d) 140.4
  18. 18.7.3 × 33 — where does the decimal point go? (a) 240.9 (b) 2409 (c) 2.409 (d) 24.09
  19. 19.0.71 × 4.9 — where does the decimal point go? (a) 0.03479 (b) 0.3479 (c) 34.79 (d) 3.479
  20. 20.0.97 × 4 — where does the decimal point go? (a) 0.388 (b) 0.0388 (c) 38.8 (d) 3.88
  21. 21.0.14 × 27 — where does the decimal point go? (a) 37.8 (b) 0.0378 (c) 0.378 (d) 3.78
  22. 22.8.4 × 9 — where does the decimal point go? (a) 7.56 (b) 75.6 (c) 0.756 (d) 756
  23. 23.9.3 × 4.4 — where does the decimal point go? (a) 40.92 (b) 409.2 (c) 0.4092 (d) 4.092
  24. 24.4.7 × 19 — where does the decimal point go? (a) 8.93 (b) 0.893 (c) 893 (d) 89.3
  25. 25.0.34 × 0.8 — where does the decimal point go? (a) 0.272 (b) 0.0272 (c) 2.72 (d) 0.00272
  26. 26.0.77 × 16 — where does the decimal point go? (a) 123.2 (b) 0.1232 (c) 1.232 (d) 12.32
  27. 27.5.9 × 3.7 — where does the decimal point go? (a) 2.183 (b) 21.83 (c) 0.2183 (d) 218.3
  28. 28.1.7 × 4.4 — where does the decimal point go? (a) 0.748 (b) 74.8 (c) 0.0748 (d) 7.48
  29. 29.9.7 × 0.9 — where does the decimal point go? (a) 87.3 (b) 8.73 (c) 0.0873 (d) 0.873
  30. 30.0.31 × 3.2 — where does the decimal point go? (a) 0.00992 (b) 0.992 (c) 0.0992 (d) 9.92
  31. 31.0.54 × 28 — where does the decimal point go? (a) 15.12 (b) 151.2 (c) 0.1512 (d) 1.512
  32. 32.0.49 × 3.9 — where does the decimal point go? (a) 19.11 (b) 1.911 (c) 0.01911 (d) 0.1911
  33. 33.0.88 × 14 — where does the decimal point go? (a) 0.1232 (b) 12.32 (c) 123.2 (d) 1.232
  34. 34.5.9 × 7 — where does the decimal point go? (a) 413 (b) 41.3 (c) 0.413 (d) 4.13
  35. 35.0.53 × 0.4 — where does the decimal point go? (a) 0.0212 (b) 0.212 (c) 0.00212 (d) 2.12
  36. 36.0.32 × 9 — where does the decimal point go? (a) 0.0288 (b) 28.8 (c) 0.288 (d) 2.88
  37. 37.7.3 × 1.1 — where does the decimal point go? (a) 0.0803 (b) 80.3 (c) 8.03 (d) 0.803
  38. 38.9.7 × 3.4 — where does the decimal point go? (a) 3.298 (b) 0.3298 (c) 329.8 (d) 32.98
  39. 39.3.6 × 12 — where does the decimal point go? (a) 432 (b) 0.432 (c) 43.2 (d) 4.32
  40. 40.0.58 × 2 — where does the decimal point go? (a) 11.6 (b) 1.16 (c) 0.116 (d) 0.0116

Answer key

  1. 0.177
  2. 19.8
  3. 6.02
  4. 2.48
  5. 0.082
  6. 4.29
  7. 3.84
  8. 0.036
  9. 0.225
  10. 8.68
  11. 0.408
  12. 0.68
  13. 0.064
  14. 0.368
  15. 42.77
  16. 24.4
  17. 140.4
  18. 240.9
  19. 3.479
  20. 3.88
  21. 3.78
  22. 75.6
  23. 40.92
  24. 89.3
  25. 0.272
  26. 12.32
  27. 21.83
  28. 7.48
  29. 8.73
  30. 0.992
  31. 15.12
  32. 1.911
  33. 12.32
  34. 41.3
  35. 0.212
  36. 2.88
  37. 8.03
  38. 32.98
  39. 43.2
  40. 1.16

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