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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 374 · 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. 1.0.17 × 8 — where does the decimal point go? (a) 13.6 (b) 0.136 (c) 1.36 (d) 0.0136
  2. 2.9.2 × 0.4 — where does the decimal point go? (a) 0.0368 (b) 0.368 (c) 36.8 (d) 3.68
  3. 3.8.7 × 4.1 — where does the decimal point go? (a) 3.567 (b) 356.7 (c) 0.3567 (d) 35.67
  4. 4.2.6 × 37 — where does the decimal point go? (a) 9.62 (b) 962 (c) 96.2 (d) 0.962
  5. 5.0.98 × 4 — where does the decimal point go? (a) 3.92 (b) 39.2 (c) 0.0392 (d) 0.392
  6. 6.0.21 × 6 — where does the decimal point go? (a) 1.26 (b) 12.6 (c) 0.126 (d) 0.0126
  7. 7.0.98 × 9 — where does the decimal point go? (a) 0.0882 (b) 8.82 (c) 88.2 (d) 0.882
  8. 8.7.3 × 0.6 — where does the decimal point go? (a) 43.8 (b) 0.0438 (c) 0.438 (d) 4.38
  9. 9.0.31 × 48 — where does the decimal point go? (a) 0.1488 (b) 14.88 (c) 1.488 (d) 148.8
  10. 10.0.83 × 8 — where does the decimal point go? (a) 0.664 (b) 0.0664 (c) 6.64 (d) 66.4
  11. 11.5.5 × 3 — where does the decimal point go? (a) 16.5 (b) 1.65 (c) 0.165 (d) 165
  12. 12.0.51 × 0.9 — where does the decimal point go? (a) 0.00459 (b) 4.59 (c) 0.459 (d) 0.0459
  13. 13.0.47 × 31 — where does the decimal point go? (a) 14.57 (b) 145.7 (c) 0.1457 (d) 1.457
  14. 14.0.96 × 37 — where does the decimal point go? (a) 0.3552 (b) 3.552 (c) 35.52 (d) 355.2
  15. 15.0.44 × 9 — where does the decimal point go? (a) 0.0396 (b) 39.6 (c) 0.396 (d) 3.96
  16. 16.4.1 × 0.4 — where does the decimal point go? (a) 16.4 (b) 0.0164 (c) 1.64 (d) 0.164
  17. 17.0.34 × 0.3 — where does the decimal point go? (a) 1.02 (b) 0.102 (c) 0.0102 (d) 0.00102
  18. 18.8.5 × 49 — where does the decimal point go? (a) 416.5 (b) 41.65 (c) 4165 (d) 4.165
  19. 19.0.18 × 0.2 — where does the decimal point go? (a) 0.00036 (b) 0.0036 (c) 0.36 (d) 0.036
  20. 20.0.47 × 0.2 — where does the decimal point go? (a) 0.094 (b) 0.00094 (c) 0.94 (d) 0.0094
  21. 21.4.8 × 0.3 — where does the decimal point go? (a) 0.0144 (b) 0.144 (c) 14.4 (d) 1.44
  22. 22.1.9 × 18 — where does the decimal point go? (a) 3.42 (b) 0.342 (c) 34.2 (d) 342
  23. 23.0.51 × 0.2 — where does the decimal point go? (a) 1.02 (b) 0.00102 (c) 0.0102 (d) 0.102
  24. 24.0.51 × 3.3 — where does the decimal point go? (a) 0.01683 (b) 16.83 (c) 1.683 (d) 0.1683
  25. 25.6.6 × 8 — where does the decimal point go? (a) 0.528 (b) 52.8 (c) 5.28 (d) 528
  26. 26.0.92 × 24 — where does the decimal point go? (a) 0.2208 (b) 2.208 (c) 220.8 (d) 22.08
  27. 27.0.36 × 0.9 — where does the decimal point go? (a) 0.324 (b) 0.0324 (c) 0.00324 (d) 3.24
  28. 28.6.6 × 0.6 — where does the decimal point go? (a) 3.96 (b) 0.396 (c) 0.0396 (d) 39.6
  29. 29.0.27 × 0.3 — where does the decimal point go? (a) 0.81 (b) 0.081 (c) 0.00081 (d) 0.0081
  30. 30.5.3 × 8 — where does the decimal point go? (a) 4.24 (b) 0.424 (c) 424 (d) 42.4
  31. 31.2.6 × 0.4 — where does the decimal point go? (a) 0.104 (b) 1.04 (c) 0.0104 (d) 10.4
  32. 32.8.7 × 7 — where does the decimal point go? (a) 6.09 (b) 609 (c) 60.9 (d) 0.609
  33. 33.0.14 × 42 — where does the decimal point go? (a) 5.88 (b) 0.0588 (c) 58.8 (d) 0.588
  34. 34.0.53 × 7 — where does the decimal point go? (a) 3.71 (b) 0.371 (c) 0.0371 (d) 37.1
  35. 35.0.56 × 9 — where does the decimal point go? (a) 0.0504 (b) 0.504 (c) 50.4 (d) 5.04
  36. 36.3.5 × 3 — where does the decimal point go? (a) 0.105 (b) 1.05 (c) 105 (d) 10.5
  37. 37.8.9 × 4 — where does the decimal point go? (a) 356 (b) 3.56 (c) 35.6 (d) 0.356
  38. 38.6.1 × 1.1 — where does the decimal point go? (a) 6.71 (b) 0.671 (c) 0.0671 (d) 67.1
  39. 39.8.6 × 2.1 — where does the decimal point go? (a) 1.806 (b) 180.6 (c) 0.1806 (d) 18.06
  40. 40.1.5 × 7 — where does the decimal point go? (a) 105 (b) 0.105 (c) 1.05 (d) 10.5

Answer key

  1. 1.36
  2. 3.68
  3. 35.67
  4. 96.2
  5. 3.92
  6. 1.26
  7. 8.82
  8. 4.38
  9. 14.88
  10. 6.64
  11. 16.5
  12. 0.459
  13. 14.57
  14. 35.52
  15. 3.96
  16. 1.64
  17. 0.102
  18. 416.5
  19. 0.036
  20. 0.094
  21. 1.44
  22. 34.2
  23. 0.102
  24. 1.683
  25. 52.8
  26. 22.08
  27. 0.324
  28. 3.96
  29. 0.081
  30. 42.4
  31. 1.04
  32. 60.9
  33. 5.88
  34. 3.71
  35. 5.04
  36. 10.5
  37. 35.6
  38. 6.71
  39. 18.06
  40. 10.5

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