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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 955 · 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. 1.1.2 × 6 — where does the decimal point go? (a) 7.2 (b) 72 (c) 0.72 (d) 0.072
  2. 2.0.66 × 8 — where does the decimal point go? (a) 52.8 (b) 5.28 (c) 0.0528 (d) 0.528
  3. 3.0.37 × 1.8 — where does the decimal point go? (a) 0.00666 (b) 0.0666 (c) 6.66 (d) 0.666
  4. 4.0.22 × 0.3 — where does the decimal point go? (a) 0.0066 (b) 0.66 (c) 0.00066 (d) 0.066
  5. 5.9.7 × 0.2 — where does the decimal point go? (a) 0.0194 (b) 19.4 (c) 1.94 (d) 0.194
  6. 6.9.5 × 3 — where does the decimal point go? (a) 285 (b) 28.5 (c) 0.285 (d) 2.85
  7. 7.0.67 × 36 — where does the decimal point go? (a) 2.412 (b) 24.12 (c) 0.2412 (d) 241.2
  8. 8.9.1 × 0.7 — where does the decimal point go? (a) 0.637 (b) 0.0637 (c) 63.7 (d) 6.37
  9. 9.7.1 × 1.3 — where does the decimal point go? (a) 0.0923 (b) 9.23 (c) 92.3 (d) 0.923
  10. 10.0.59 × 0.2 — where does the decimal point go? (a) 0.118 (b) 0.00118 (c) 0.0118 (d) 1.18
  11. 11.0.74 × 16 — where does the decimal point go? (a) 11.84 (b) 118.4 (c) 0.1184 (d) 1.184
  12. 12.0.48 × 3.8 — where does the decimal point go? (a) 0.01824 (b) 0.1824 (c) 1.824 (d) 18.24
  13. 13.1.7 × 7 — where does the decimal point go? (a) 11.9 (b) 0.119 (c) 119 (d) 1.19
  14. 14.5.9 × 13 — where does the decimal point go? (a) 7.67 (b) 767 (c) 76.7 (d) 0.767
  15. 15.1.2 × 2.9 — where does the decimal point go? (a) 0.0348 (b) 34.8 (c) 0.348 (d) 3.48
  16. 16.0.23 × 8 — where does the decimal point go? (a) 0.184 (b) 18.4 (c) 0.0184 (d) 1.84
  17. 17.0.85 × 49 — where does the decimal point go? (a) 41.65 (b) 0.4165 (c) 4.165 (d) 416.5
  18. 18.0.54 × 32 — where does the decimal point go? (a) 172.8 (b) 17.28 (c) 1.728 (d) 0.1728
  19. 19.5.9 × 0.6 — where does the decimal point go? (a) 0.354 (b) 3.54 (c) 35.4 (d) 0.0354
  20. 20.0.43 × 3.6 — where does the decimal point go? (a) 0.01548 (b) 15.48 (c) 0.1548 (d) 1.548
  21. 21.0.38 × 2.6 — where does the decimal point go? (a) 0.00988 (b) 9.88 (c) 0.0988 (d) 0.988
  22. 22.0.39 × 1.9 — where does the decimal point go? (a) 0.0741 (b) 0.741 (c) 0.00741 (d) 7.41
  23. 23.0.46 × 3.1 — where does the decimal point go? (a) 0.1426 (b) 0.01426 (c) 14.26 (d) 1.426
  24. 24.0.38 × 3 — where does the decimal point go? (a) 11.4 (b) 1.14 (c) 0.114 (d) 0.0114
  25. 25.4.4 × 7 — where does the decimal point go? (a) 0.308 (b) 308 (c) 3.08 (d) 30.8
  26. 26.2.9 × 0.9 — where does the decimal point go? (a) 0.0261 (b) 2.61 (c) 26.1 (d) 0.261
  27. 27.0.61 × 1.6 — where does the decimal point go? (a) 9.76 (b) 0.976 (c) 0.0976 (d) 0.00976
  28. 28.0.99 × 49 — where does the decimal point go? (a) 4.851 (b) 0.4851 (c) 48.51 (d) 485.1
  29. 29.1.4 × 4.2 — where does the decimal point go? (a) 58.8 (b) 5.88 (c) 0.0588 (d) 0.588
  30. 30.0.24 × 3 — where does the decimal point go? (a) 0.72 (b) 0.0072 (c) 0.072 (d) 7.2
  31. 31.0.37 × 0.3 — where does the decimal point go? (a) 0.111 (b) 1.11 (c) 0.00111 (d) 0.0111
  32. 32.0.96 × 3 — where does the decimal point go? (a) 2.88 (b) 0.0288 (c) 0.288 (d) 28.8
  33. 33.4.9 × 4.9 — where does the decimal point go? (a) 0.2401 (b) 2.401 (c) 24.01 (d) 240.1
  34. 34.0.13 × 8 — where does the decimal point go? (a) 0.0104 (b) 0.104 (c) 1.04 (d) 10.4
  35. 35.9.8 × 32 — where does the decimal point go? (a) 31.36 (b) 313.6 (c) 3.136 (d) 3136
  36. 36.3.2 × 9 — where does the decimal point go? (a) 288 (b) 0.288 (c) 2.88 (d) 28.8
  37. 37.8.9 × 8 — where does the decimal point go? (a) 7.12 (b) 712 (c) 71.2 (d) 0.712
  38. 38.4.8 × 41 — where does the decimal point go? (a) 1.968 (b) 1968 (c) 196.8 (d) 19.68
  39. 39.2.6 × 23 — where does the decimal point go? (a) 0.598 (b) 59.8 (c) 5.98 (d) 598
  40. 40.3.6 × 0.4 — where does the decimal point go? (a) 1.44 (b) 0.0144 (c) 14.4 (d) 0.144

Answer key

  1. 7.2
  2. 5.28
  3. 0.666
  4. 0.066
  5. 1.94
  6. 28.5
  7. 24.12
  8. 6.37
  9. 9.23
  10. 0.118
  11. 11.84
  12. 1.824
  13. 11.9
  14. 76.7
  15. 3.48
  16. 1.84
  17. 41.65
  18. 17.28
  19. 3.54
  20. 1.548
  21. 0.988
  22. 0.741
  23. 1.426
  24. 1.14
  25. 30.8
  26. 2.61
  27. 0.976
  28. 48.51
  29. 5.88
  30. 0.72
  31. 0.111
  32. 2.88
  33. 24.01
  34. 1.04
  35. 313.6
  36. 28.8
  37. 71.2
  38. 196.8
  39. 59.8
  40. 1.44

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