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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 659 · 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. 1.0.24 × 7 — where does the decimal point go? (a) 1.68 (b) 16.8 (c) 0.0168 (d) 0.168
  2. 2.8.4 × 0.9 — where does the decimal point go? (a) 7.56 (b) 0.756 (c) 0.0756 (d) 75.6
  3. 3.6.7 × 9 — where does the decimal point go? (a) 0.603 (b) 6.03 (c) 603 (d) 60.3
  4. 4.0.71 × 0.2 — where does the decimal point go? (a) 0.142 (b) 1.42 (c) 0.0142 (d) 0.00142
  5. 5.0.33 × 4.2 — where does the decimal point go? (a) 0.01386 (b) 0.1386 (c) 13.86 (d) 1.386
  6. 6.0.57 × 17 — where does the decimal point go? (a) 96.9 (b) 0.0969 (c) 9.69 (d) 0.969
  7. 7.6.4 × 0.2 — where does the decimal point go? (a) 0.0128 (b) 0.128 (c) 12.8 (d) 1.28
  8. 8.0.24 × 13 — where does the decimal point go? (a) 3.12 (b) 0.0312 (c) 31.2 (d) 0.312
  9. 9.0.93 × 36 — where does the decimal point go? (a) 334.8 (b) 3.348 (c) 0.3348 (d) 33.48
  10. 10.2.8 × 4.9 — where does the decimal point go? (a) 1.372 (b) 0.1372 (c) 137.2 (d) 13.72
  11. 11.0.59 × 41 — where does the decimal point go? (a) 241.9 (b) 24.19 (c) 0.2419 (d) 2.419
  12. 12.9.2 × 24 — where does the decimal point go? (a) 22.08 (b) 220.8 (c) 2.208 (d) 2208
  13. 13.0.83 × 6 — where does the decimal point go? (a) 4.98 (b) 0.498 (c) 0.0498 (d) 49.8
  14. 14.7.8 × 47 — where does the decimal point go? (a) 36.66 (b) 3666 (c) 366.6 (d) 3.666
  15. 15.0.86 × 41 — where does the decimal point go? (a) 352.6 (b) 0.3526 (c) 35.26 (d) 3.526
  16. 16.0.86 × 8 — where does the decimal point go? (a) 0.688 (b) 6.88 (c) 68.8 (d) 0.0688
  17. 17.2.5 × 3 — where does the decimal point go? (a) 7.5 (b) 0.075 (c) 75 (d) 0.75
  18. 18.0.91 × 7 — where does the decimal point go? (a) 0.0637 (b) 0.637 (c) 6.37 (d) 63.7
  19. 19.0.13 × 4 — where does the decimal point go? (a) 0.0052 (b) 0.052 (c) 5.2 (d) 0.52
  20. 20.0.64 × 2.8 — where does the decimal point go? (a) 0.01792 (b) 0.1792 (c) 17.92 (d) 1.792
  21. 21.0.58 × 0.6 — where does the decimal point go? (a) 0.0348 (b) 3.48 (c) 0.00348 (d) 0.348
  22. 22.4.7 × 9 — where does the decimal point go? (a) 42.3 (b) 0.423 (c) 423 (d) 4.23
  23. 23.0.41 × 5 — where does the decimal point go? (a) 2.05 (b) 20.5 (c) 0.0205 (d) 0.205
  24. 24.9.6 × 8 — where does the decimal point go? (a) 0.768 (b) 76.8 (c) 7.68 (d) 768
  25. 25.2.3 × 0.7 — where does the decimal point go? (a) 1.61 (b) 0.161 (c) 0.0161 (d) 16.1
  26. 26.0.62 × 24 — where does the decimal point go? (a) 14.88 (b) 148.8 (c) 0.1488 (d) 1.488
  27. 27.6.6 × 4.2 — where does the decimal point go? (a) 277.2 (b) 2.772 (c) 0.2772 (d) 27.72
  28. 28.2.4 × 0.4 — where does the decimal point go? (a) 0.096 (b) 9.6 (c) 0.96 (d) 0.0096
  29. 29.0.85 × 3.5 — where does the decimal point go? (a) 2.975 (b) 0.02975 (c) 0.2975 (d) 29.75
  30. 30.0.66 × 4 — where does the decimal point go? (a) 0.0264 (b) 0.264 (c) 2.64 (d) 26.4
  31. 31.5.2 × 4 — where does the decimal point go? (a) 208 (b) 2.08 (c) 0.208 (d) 20.8
  32. 32.8.9 × 8 — where does the decimal point go? (a) 7.12 (b) 0.712 (c) 71.2 (d) 712
  33. 33.8.1 × 9 — where does the decimal point go? (a) 0.729 (b) 729 (c) 72.9 (d) 7.29
  34. 34.5.2 × 3.6 — where does the decimal point go? (a) 18.72 (b) 187.2 (c) 1.872 (d) 0.1872
  35. 35.1.8 × 2.2 — where does the decimal point go? (a) 39.6 (b) 3.96 (c) 0.0396 (d) 0.396
  36. 36.0.31 × 39 — where does the decimal point go? (a) 1.209 (b) 12.09 (c) 120.9 (d) 0.1209
  37. 37.0.93 × 0.4 — where does the decimal point go? (a) 0.00372 (b) 0.372 (c) 0.0372 (d) 3.72
  38. 38.9.2 × 0.9 — where does the decimal point go? (a) 82.8 (b) 8.28 (c) 0.828 (d) 0.0828
  39. 39.0.77 × 3 — where does the decimal point go? (a) 2.31 (b) 0.231 (c) 0.0231 (d) 23.1
  40. 40.8.9 × 2 — where does the decimal point go? (a) 1.78 (b) 0.178 (c) 178 (d) 17.8

Answer key

  1. 1.68
  2. 7.56
  3. 60.3
  4. 0.142
  5. 1.386
  6. 9.69
  7. 1.28
  8. 3.12
  9. 33.48
  10. 13.72
  11. 24.19
  12. 220.8
  13. 4.98
  14. 366.6
  15. 35.26
  16. 6.88
  17. 7.5
  18. 6.37
  19. 0.52
  20. 1.792
  21. 0.348
  22. 42.3
  23. 2.05
  24. 76.8
  25. 1.61
  26. 14.88
  27. 27.72
  28. 0.96
  29. 2.975
  30. 2.64
  31. 20.8
  32. 71.2
  33. 72.9
  34. 18.72
  35. 3.96
  36. 12.09
  37. 0.372
  38. 8.28
  39. 2.31
  40. 17.8

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