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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 938 · 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. 1.0.36 × 8 — where does the decimal point go? (a) 0.288 (b) 2.88 (c) 28.8 (d) 0.0288
  2. 2.0.82 × 4.2 — where does the decimal point go? (a) 34.44 (b) 0.3444 (c) 0.03444 (d) 3.444
  3. 3.0.42 × 43 — where does the decimal point go? (a) 18.06 (b) 0.1806 (c) 180.6 (d) 1.806
  4. 4.6.2 × 7 — where does the decimal point go? (a) 4.34 (b) 434 (c) 43.4 (d) 0.434
  5. 5.0.76 × 0.7 — where does the decimal point go? (a) 0.00532 (b) 0.532 (c) 5.32 (d) 0.0532
  6. 6.0.17 × 36 — where does the decimal point go? (a) 0.0612 (b) 0.612 (c) 61.2 (d) 6.12
  7. 7.3.2 × 0.9 — where does the decimal point go? (a) 28.8 (b) 0.0288 (c) 0.288 (d) 2.88
  8. 8.3.4 × 0.2 — where does the decimal point go? (a) 0.68 (b) 6.8 (c) 0.0068 (d) 0.068
  9. 9.0.41 × 1.7 — where does the decimal point go? (a) 6.97 (b) 0.00697 (c) 0.697 (d) 0.0697
  10. 10.1.2 × 12 — where does the decimal point go? (a) 0.144 (b) 14.4 (c) 144 (d) 1.44
  11. 11.9.5 × 7 — where does the decimal point go? (a) 665 (b) 66.5 (c) 0.665 (d) 6.65
  12. 12.0.32 × 0.7 — where does the decimal point go? (a) 2.24 (b) 0.224 (c) 0.0224 (d) 0.00224
  13. 13.7.7 × 0.4 — where does the decimal point go? (a) 3.08 (b) 0.308 (c) 0.0308 (d) 30.8
  14. 14.8.8 × 0.3 — where does the decimal point go? (a) 26.4 (b) 2.64 (c) 0.0264 (d) 0.264
  15. 15.6.7 × 6 — where does the decimal point go? (a) 0.402 (b) 4.02 (c) 402 (d) 40.2
  16. 16.3.6 × 0.7 — where does the decimal point go? (a) 0.252 (b) 2.52 (c) 25.2 (d) 0.0252
  17. 17.0.32 × 9 — where does the decimal point go? (a) 2.88 (b) 0.288 (c) 0.0288 (d) 28.8
  18. 18.9.7 × 0.6 — where does the decimal point go? (a) 0.0582 (b) 0.582 (c) 5.82 (d) 58.2
  19. 19.9.9 × 3 — where does the decimal point go? (a) 2.97 (b) 0.297 (c) 297 (d) 29.7
  20. 20.6.2 × 4.9 — where does the decimal point go? (a) 303.8 (b) 3.038 (c) 0.3038 (d) 30.38
  21. 21.0.15 × 5 — where does the decimal point go? (a) 0.0075 (b) 7.5 (c) 0.75 (d) 0.075
  22. 22.0.48 × 8 — where does the decimal point go? (a) 38.4 (b) 0.384 (c) 0.0384 (d) 3.84
  23. 23.0.43 × 4.6 — where does the decimal point go? (a) 0.1978 (b) 0.01978 (c) 1.978 (d) 19.78
  24. 24.3.7 × 32 — where does the decimal point go? (a) 11.84 (b) 1184 (c) 118.4 (d) 1.184
  25. 25.7.1 × 3.1 — where does the decimal point go? (a) 2.201 (b) 220.1 (c) 0.2201 (d) 22.01
  26. 26.3.2 × 8 — where does the decimal point go? (a) 2.56 (b) 25.6 (c) 0.256 (d) 256
  27. 27.8.7 × 0.5 — where does the decimal point go? (a) 0.0435 (b) 4.35 (c) 0.435 (d) 43.5
  28. 28.8.3 × 0.9 — where does the decimal point go? (a) 0.0747 (b) 0.747 (c) 7.47 (d) 74.7
  29. 29.1.3 × 34 — where does the decimal point go? (a) 4.42 (b) 0.442 (c) 44.2 (d) 442
  30. 30.7.8 × 9 — where does the decimal point go? (a) 70.2 (b) 7.02 (c) 702 (d) 0.702
  31. 31.0.14 × 2 — where does the decimal point go? (a) 0.28 (b) 0.028 (c) 0.0028 (d) 2.8
  32. 32.0.83 × 21 — where does the decimal point go? (a) 0.1743 (b) 17.43 (c) 1.743 (d) 174.3
  33. 33.2.7 × 28 — where does the decimal point go? (a) 75.6 (b) 0.756 (c) 7.56 (d) 756
  34. 34.8.6 × 2.3 — where does the decimal point go? (a) 19.78 (b) 0.1978 (c) 197.8 (d) 1.978
  35. 35.0.16 × 0.2 — where does the decimal point go? (a) 0.0032 (b) 0.032 (c) 0.00032 (d) 0.32
  36. 36.8.2 × 0.4 — where does the decimal point go? (a) 3.28 (b) 0.0328 (c) 0.328 (d) 32.8
  37. 37.1.9 × 3 — where does the decimal point go? (a) 0.057 (b) 57 (c) 5.7 (d) 0.57
  38. 38.7.2 × 23 — where does the decimal point go? (a) 1.656 (b) 1656 (c) 165.6 (d) 16.56
  39. 39.0.35 × 13 — where does the decimal point go? (a) 45.5 (b) 0.0455 (c) 4.55 (d) 0.455
  40. 40.6.3 × 9 — where does the decimal point go? (a) 567 (b) 0.567 (c) 5.67 (d) 56.7

Answer key

  1. 2.88
  2. 3.444
  3. 18.06
  4. 43.4
  5. 0.532
  6. 6.12
  7. 2.88
  8. 0.68
  9. 0.697
  10. 14.4
  11. 66.5
  12. 0.224
  13. 3.08
  14. 2.64
  15. 40.2
  16. 2.52
  17. 2.88
  18. 5.82
  19. 29.7
  20. 30.38
  21. 0.75
  22. 3.84
  23. 1.978
  24. 118.4
  25. 22.01
  26. 25.6
  27. 4.35
  28. 7.47
  29. 44.2
  30. 70.2
  31. 0.28
  32. 17.43
  33. 75.6
  34. 19.78
  35. 0.032
  36. 3.28
  37. 5.7
  38. 165.6
  39. 4.55
  40. 56.7

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