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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 898 · 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. 1.0.62 × 0.4 — where does the decimal point go? (a) 0.248 (b) 0.0248 (c) 2.48 (d) 0.00248
  2. 2.0.58 × 3.8 — where does the decimal point go? (a) 0.2204 (b) 2.204 (c) 0.02204 (d) 22.04
  3. 3.0.51 × 3 — where does the decimal point go? (a) 0.153 (b) 15.3 (c) 1.53 (d) 0.0153
  4. 4.0.78 × 9 — where does the decimal point go? (a) 70.2 (b) 0.0702 (c) 0.702 (d) 7.02
  5. 5.0.39 × 4 — where does the decimal point go? (a) 15.6 (b) 0.156 (c) 1.56 (d) 0.0156
  6. 6.0.39 × 2.9 — where does the decimal point go? (a) 0.01131 (b) 1.131 (c) 0.1131 (d) 11.31
  7. 7.0.28 × 3.4 — where does the decimal point go? (a) 0.952 (b) 0.0952 (c) 9.52 (d) 0.00952
  8. 8.1.3 × 9 — where does the decimal point go? (a) 1.17 (b) 11.7 (c) 0.117 (d) 117
  9. 9.6.7 × 1.5 — where does the decimal point go? (a) 100.5 (b) 1.005 (c) 10.05 (d) 0.1005
  10. 10.0.76 × 8 — where does the decimal point go? (a) 6.08 (b) 0.0608 (c) 60.8 (d) 0.608
  11. 11.2.8 × 0.8 — where does the decimal point go? (a) 0.224 (b) 2.24 (c) 22.4 (d) 0.0224
  12. 12.2.2 × 0.9 — where does the decimal point go? (a) 0.0198 (b) 0.198 (c) 19.8 (d) 1.98
  13. 13.0.27 × 0.7 — where does the decimal point go? (a) 0.189 (b) 0.0189 (c) 0.00189 (d) 1.89
  14. 14.0.17 × 0.3 — where does the decimal point go? (a) 0.051 (b) 0.00051 (c) 0.0051 (d) 0.51
  15. 15.4.1 × 1.3 — where does the decimal point go? (a) 53.3 (b) 0.533 (c) 0.0533 (d) 5.33
  16. 16.2.9 × 5 — where does the decimal point go? (a) 14.5 (b) 1.45 (c) 145 (d) 0.145
  17. 17.0.34 × 21 — where does the decimal point go? (a) 71.4 (b) 0.0714 (c) 7.14 (d) 0.714
  18. 18.5.1 × 0.5 — where does the decimal point go? (a) 0.255 (b) 2.55 (c) 0.0255 (d) 25.5
  19. 19.0.52 × 6 — where does the decimal point go? (a) 3.12 (b) 0.0312 (c) 0.312 (d) 31.2
  20. 20.5.1 × 41 — where does the decimal point go? (a) 20.91 (b) 2.091 (c) 2091 (d) 209.1
  21. 21.5.8 × 27 — where does the decimal point go? (a) 1566 (b) 15.66 (c) 1.566 (d) 156.6
  22. 22.9.8 × 0.8 — where does the decimal point go? (a) 7.84 (b) 0.0784 (c) 78.4 (d) 0.784
  23. 23.6.3 × 3.4 — where does the decimal point go? (a) 2.142 (b) 214.2 (c) 0.2142 (d) 21.42
  24. 24.0.41 × 0.3 — where does the decimal point go? (a) 0.00123 (b) 0.0123 (c) 1.23 (d) 0.123
  25. 25.2.3 × 0.2 — where does the decimal point go? (a) 0.0046 (b) 0.46 (c) 0.046 (d) 4.6
  26. 26.0.51 × 2.9 — where does the decimal point go? (a) 0.1479 (b) 1.479 (c) 0.01479 (d) 14.79
  27. 27.0.21 × 44 — where does the decimal point go? (a) 0.0924 (b) 92.4 (c) 9.24 (d) 0.924
  28. 28.4.2 × 18 — where does the decimal point go? (a) 756 (b) 75.6 (c) 7.56 (d) 0.756
  29. 29.0.44 × 4.1 — where does the decimal point go? (a) 0.01804 (b) 18.04 (c) 0.1804 (d) 1.804
  30. 30.5.6 × 0.9 — where does the decimal point go? (a) 50.4 (b) 0.0504 (c) 0.504 (d) 5.04
  31. 31.5.4 × 0.9 — where does the decimal point go? (a) 4.86 (b) 0.0486 (c) 0.486 (d) 48.6
  32. 32.0.54 × 12 — where does the decimal point go? (a) 0.0648 (b) 6.48 (c) 64.8 (d) 0.648
  33. 33.0.19 × 0.2 — where does the decimal point go? (a) 0.00038 (b) 0.38 (c) 0.038 (d) 0.0038
  34. 34.0.89 × 36 — where does the decimal point go? (a) 320.4 (b) 0.3204 (c) 32.04 (d) 3.204
  35. 35.7.9 × 23 — where does the decimal point go? (a) 1817 (b) 181.7 (c) 18.17 (d) 1.817
  36. 36.0.64 × 2.7 — where does the decimal point go? (a) 0.01728 (b) 1.728 (c) 17.28 (d) 0.1728
  37. 37.7.1 × 0.6 — where does the decimal point go? (a) 42.6 (b) 0.426 (c) 0.0426 (d) 4.26
  38. 38.3.7 × 0.9 — where does the decimal point go? (a) 0.333 (b) 0.0333 (c) 3.33 (d) 33.3
  39. 39.0.53 × 44 — where does the decimal point go? (a) 0.2332 (b) 233.2 (c) 23.32 (d) 2.332
  40. 40.0.57 × 1.5 — where does the decimal point go? (a) 0.0855 (b) 0.855 (c) 8.55 (d) 0.00855

Answer key

  1. 0.248
  2. 2.204
  3. 1.53
  4. 7.02
  5. 1.56
  6. 1.131
  7. 0.952
  8. 11.7
  9. 10.05
  10. 6.08
  11. 2.24
  12. 1.98
  13. 0.189
  14. 0.051
  15. 5.33
  16. 14.5
  17. 7.14
  18. 2.55
  19. 3.12
  20. 209.1
  21. 156.6
  22. 7.84
  23. 21.42
  24. 0.123
  25. 0.46
  26. 1.479
  27. 9.24
  28. 75.6
  29. 1.804
  30. 5.04
  31. 4.86
  32. 6.48
  33. 0.038
  34. 32.04
  35. 181.7
  36. 1.728
  37. 4.26
  38. 3.33
  39. 23.32
  40. 0.855

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