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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 440 · 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. 1.2.2 × 1.4 — where does the decimal point go? (a) 0.0308 (b) 0.308 (c) 30.8 (d) 3.08
  2. 2.0.62 × 4 — where does the decimal point go? (a) 0.0248 (b) 2.48 (c) 0.248 (d) 24.8
  3. 3.0.87 × 8 — where does the decimal point go? (a) 6.96 (b) 69.6 (c) 0.0696 (d) 0.696
  4. 4.5.7 × 0.3 — where does the decimal point go? (a) 1.71 (b) 17.1 (c) 0.0171 (d) 0.171
  5. 5.0.77 × 0.7 — where does the decimal point go? (a) 0.00539 (b) 5.39 (c) 0.539 (d) 0.0539
  6. 6.0.24 × 0.2 — where does the decimal point go? (a) 0.0048 (b) 0.00048 (c) 0.048 (d) 0.48
  7. 7.0.96 × 3 — where does the decimal point go? (a) 2.88 (b) 28.8 (c) 0.0288 (d) 0.288
  8. 8.1.4 × 4.7 — where does the decimal point go? (a) 6.58 (b) 0.0658 (c) 0.658 (d) 65.8
  9. 9.0.96 × 7 — where does the decimal point go? (a) 0.672 (b) 6.72 (c) 0.0672 (d) 67.2
  10. 10.0.28 × 3 — where does the decimal point go? (a) 8.4 (b) 0.84 (c) 0.0084 (d) 0.084
  11. 11.8.1 × 3 — where does the decimal point go? (a) 2.43 (b) 243 (c) 0.243 (d) 24.3
  12. 12.8.7 × 3 — where does the decimal point go? (a) 0.261 (b) 261 (c) 26.1 (d) 2.61
  13. 13.6.9 × 2.1 — where does the decimal point go? (a) 14.49 (b) 1.449 (c) 144.9 (d) 0.1449
  14. 14.0.47 × 0.7 — where does the decimal point go? (a) 0.0329 (b) 3.29 (c) 0.00329 (d) 0.329
  15. 15.8.4 × 14 — where does the decimal point go? (a) 117.6 (b) 1.176 (c) 11.76 (d) 1176
  16. 16.0.79 × 8 — where does the decimal point go? (a) 6.32 (b) 0.632 (c) 63.2 (d) 0.0632
  17. 17.1.7 × 0.6 — where does the decimal point go? (a) 1.02 (b) 0.102 (c) 10.2 (d) 0.0102
  18. 18.4.6 × 0.9 — where does the decimal point go? (a) 0.414 (b) 0.0414 (c) 4.14 (d) 41.4
  19. 19.0.67 × 41 — where does the decimal point go? (a) 274.7 (b) 2.747 (c) 0.2747 (d) 27.47
  20. 20.9.8 × 6 — where does the decimal point go? (a) 58.8 (b) 5.88 (c) 588 (d) 0.588
  21. 21.3.8 × 8 — where does the decimal point go? (a) 3.04 (b) 30.4 (c) 0.304 (d) 304
  22. 22.9.5 × 13 — where does the decimal point go? (a) 123.5 (b) 12.35 (c) 1.235 (d) 1235
  23. 23.0.21 × 5 — where does the decimal point go? (a) 0.105 (b) 0.0105 (c) 10.5 (d) 1.05
  24. 24.8.1 × 23 — where does the decimal point go? (a) 1.863 (b) 18.63 (c) 186.3 (d) 1863
  25. 25.9.9 × 1.9 — where does the decimal point go? (a) 0.1881 (b) 188.1 (c) 1.881 (d) 18.81
  26. 26.8.5 × 0.3 — where does the decimal point go? (a) 0.255 (b) 0.0255 (c) 25.5 (d) 2.55
  27. 27.4.4 × 3.9 — where does the decimal point go? (a) 0.1716 (b) 17.16 (c) 171.6 (d) 1.716
  28. 28.2.5 × 19 — where does the decimal point go? (a) 47.5 (b) 475 (c) 4.75 (d) 0.475
  29. 29.0.96 × 17 — where does the decimal point go? (a) 16.32 (b) 0.1632 (c) 163.2 (d) 1.632
  30. 30.6.6 × 2 — where does the decimal point go? (a) 0.132 (b) 1.32 (c) 13.2 (d) 132
  31. 31.0.26 × 8 — where does the decimal point go? (a) 0.208 (b) 0.0208 (c) 20.8 (d) 2.08
  32. 32.6.8 × 0.2 — where does the decimal point go? (a) 13.6 (b) 0.0136 (c) 1.36 (d) 0.136
  33. 33.2.9 × 24 — where does the decimal point go? (a) 69.6 (b) 0.696 (c) 696 (d) 6.96
  34. 34.2.1 × 12 — where does the decimal point go? (a) 2.52 (b) 252 (c) 25.2 (d) 0.252
  35. 35.5.4 × 28 — where does the decimal point go? (a) 151.2 (b) 15.12 (c) 1.512 (d) 1512
  36. 36.9.2 × 9 — where does the decimal point go? (a) 828 (b) 8.28 (c) 82.8 (d) 0.828
  37. 37.5.3 × 2.1 — where does the decimal point go? (a) 11.13 (b) 0.1113 (c) 111.3 (d) 1.113
  38. 38.7.7 × 8 — where does the decimal point go? (a) 6.16 (b) 616 (c) 61.6 (d) 0.616
  39. 39.6.6 × 4 — where does the decimal point go? (a) 2.64 (b) 0.264 (c) 26.4 (d) 264
  40. 40.5.7 × 1.1 — where does the decimal point go? (a) 0.627 (b) 62.7 (c) 0.0627 (d) 6.27

Answer key

  1. 3.08
  2. 2.48
  3. 6.96
  4. 1.71
  5. 0.539
  6. 0.048
  7. 2.88
  8. 6.58
  9. 6.72
  10. 0.84
  11. 24.3
  12. 26.1
  13. 14.49
  14. 0.329
  15. 117.6
  16. 6.32
  17. 1.02
  18. 4.14
  19. 27.47
  20. 58.8
  21. 30.4
  22. 123.5
  23. 1.05
  24. 186.3
  25. 18.81
  26. 2.55
  27. 17.16
  28. 47.5
  29. 16.32
  30. 13.2
  31. 2.08
  32. 1.36
  33. 69.6
  34. 25.2
  35. 151.2
  36. 82.8
  37. 11.13
  38. 61.6
  39. 26.4
  40. 6.27

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