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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 174 · 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. 1.8.6 × 39 — where does the decimal point go? (a) 335.4 (b) 3.354 (c) 33.54 (d) 3354
  2. 2.0.38 × 9 — where does the decimal point go? (a) 34.2 (b) 0.342 (c) 3.42 (d) 0.0342
  3. 3.5.6 × 26 — where does the decimal point go? (a) 14.56 (b) 1.456 (c) 1456 (d) 145.6
  4. 4.3.5 × 17 — where does the decimal point go? (a) 0.595 (b) 5.95 (c) 59.5 (d) 595
  5. 5.0.45 × 3 — where does the decimal point go? (a) 1.35 (b) 0.0135 (c) 0.135 (d) 13.5
  6. 6.0.49 × 2 — where does the decimal point go? (a) 0.98 (b) 0.098 (c) 0.0098 (d) 9.8
  7. 7.0.84 × 16 — where does the decimal point go? (a) 134.4 (b) 13.44 (c) 0.1344 (d) 1.344
  8. 8.8.6 × 4.6 — where does the decimal point go? (a) 39.56 (b) 0.3956 (c) 395.6 (d) 3.956
  9. 9.0.67 × 0.4 — where does the decimal point go? (a) 0.0268 (b) 0.00268 (c) 0.268 (d) 2.68
  10. 10.4.8 × 2.7 — where does the decimal point go? (a) 12.96 (b) 1.296 (c) 0.1296 (d) 129.6
  11. 11.0.29 × 0.7 — where does the decimal point go? (a) 0.0203 (b) 0.203 (c) 0.00203 (d) 2.03
  12. 12.1.9 × 2 — where does the decimal point go? (a) 38 (b) 0.038 (c) 0.38 (d) 3.8
  13. 13.9.7 × 0.2 — where does the decimal point go? (a) 0.0194 (b) 1.94 (c) 0.194 (d) 19.4
  14. 14.2.7 × 44 — where does the decimal point go? (a) 11.88 (b) 118.8 (c) 1188 (d) 1.188
  15. 15.9.4 × 6 — where does the decimal point go? (a) 5.64 (b) 0.564 (c) 564 (d) 56.4
  16. 16.8.9 × 3 — where does the decimal point go? (a) 0.267 (b) 26.7 (c) 267 (d) 2.67
  17. 17.8.4 × 2 — where does the decimal point go? (a) 0.168 (b) 1.68 (c) 168 (d) 16.8
  18. 18.9.1 × 2.6 — where does the decimal point go? (a) 0.2366 (b) 23.66 (c) 236.6 (d) 2.366
  19. 19.0.48 × 3 — where does the decimal point go? (a) 1.44 (b) 0.0144 (c) 0.144 (d) 14.4
  20. 20.7.5 × 0.3 — where does the decimal point go? (a) 0.225 (b) 2.25 (c) 0.0225 (d) 22.5
  21. 21.8.3 × 3.6 — where does the decimal point go? (a) 298.8 (b) 29.88 (c) 0.2988 (d) 2.988
  22. 22.6.8 × 4.1 — where does the decimal point go? (a) 27.88 (b) 2.788 (c) 0.2788 (d) 278.8
  23. 23.4.1 × 3 — where does the decimal point go? (a) 12.3 (b) 123 (c) 1.23 (d) 0.123
  24. 24.1.3 × 45 — where does the decimal point go? (a) 0.585 (b) 5.85 (c) 58.5 (d) 585
  25. 25.0.75 × 3 — where does the decimal point go? (a) 22.5 (b) 2.25 (c) 0.0225 (d) 0.225
  26. 26.5.5 × 0.7 — where does the decimal point go? (a) 0.385 (b) 0.0385 (c) 38.5 (d) 3.85
  27. 27.4.9 × 26 — where does the decimal point go? (a) 1274 (b) 12.74 (c) 127.4 (d) 1.274
  28. 28.5.3 × 37 — where does the decimal point go? (a) 1.961 (b) 19.61 (c) 196.1 (d) 1961
  29. 29.0.73 × 16 — where does the decimal point go? (a) 0.1168 (b) 11.68 (c) 1.168 (d) 116.8
  30. 30.0.34 × 17 — where does the decimal point go? (a) 57.8 (b) 0.0578 (c) 0.578 (d) 5.78
  31. 31.2.2 × 1.7 — where does the decimal point go? (a) 3.74 (b) 37.4 (c) 0.0374 (d) 0.374
  32. 32.0.98 × 7 — where does the decimal point go? (a) 0.0686 (b) 0.686 (c) 68.6 (d) 6.86
  33. 33.0.82 × 9 — where does the decimal point go? (a) 0.0738 (b) 0.738 (c) 73.8 (d) 7.38
  34. 34.6.3 × 0.4 — where does the decimal point go? (a) 0.252 (b) 2.52 (c) 25.2 (d) 0.0252
  35. 35.9.6 × 0.7 — where does the decimal point go? (a) 6.72 (b) 0.672 (c) 67.2 (d) 0.0672
  36. 36.0.28 × 9 — where does the decimal point go? (a) 2.52 (b) 0.252 (c) 25.2 (d) 0.0252
  37. 37.7.7 × 0.7 — where does the decimal point go? (a) 0.539 (b) 5.39 (c) 0.0539 (d) 53.9
  38. 38.2.4 × 33 — where does the decimal point go? (a) 7.92 (b) 79.2 (c) 0.792 (d) 792
  39. 39.8.3 × 39 — where does the decimal point go? (a) 32.37 (b) 323.7 (c) 3237 (d) 3.237
  40. 40.8.7 × 6 — where does the decimal point go? (a) 5.22 (b) 522 (c) 52.2 (d) 0.522

Answer key

  1. 335.4
  2. 3.42
  3. 145.6
  4. 59.5
  5. 1.35
  6. 0.98
  7. 13.44
  8. 39.56
  9. 0.268
  10. 12.96
  11. 0.203
  12. 3.8
  13. 1.94
  14. 118.8
  15. 56.4
  16. 26.7
  17. 16.8
  18. 23.66
  19. 1.44
  20. 2.25
  21. 29.88
  22. 27.88
  23. 12.3
  24. 58.5
  25. 2.25
  26. 3.85
  27. 127.4
  28. 196.1
  29. 11.68
  30. 5.78
  31. 3.74
  32. 6.86
  33. 7.38
  34. 2.52
  35. 6.72
  36. 2.52
  37. 5.39
  38. 79.2
  39. 323.7
  40. 52.2

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