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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 441 · 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. 1.5.8 × 47 — where does the decimal point go? (a) 27.26 (b) 2.726 (c) 272.6 (d) 2726
  2. 2.0.51 × 0.4 — where does the decimal point go? (a) 0.00204 (b) 0.204 (c) 2.04 (d) 0.0204
  3. 3.0.56 × 0.3 — where does the decimal point go? (a) 1.68 (b) 0.00168 (c) 0.168 (d) 0.0168
  4. 4.3.4 × 0.2 — where does the decimal point go? (a) 0.68 (b) 0.0068 (c) 6.8 (d) 0.068
  5. 5.0.16 × 4.2 — where does the decimal point go? (a) 0.00672 (b) 6.72 (c) 0.0672 (d) 0.672
  6. 6.0.14 × 9 — where does the decimal point go? (a) 1.26 (b) 12.6 (c) 0.0126 (d) 0.126
  7. 7.1.3 × 41 — where does the decimal point go? (a) 53.3 (b) 0.533 (c) 5.33 (d) 533
  8. 8.3.9 × 43 — where does the decimal point go? (a) 16.77 (b) 1677 (c) 167.7 (d) 1.677
  9. 9.6.1 × 16 — where does the decimal point go? (a) 0.976 (b) 976 (c) 9.76 (d) 97.6
  10. 10.0.58 × 24 — where does the decimal point go? (a) 13.92 (b) 1.392 (c) 0.1392 (d) 139.2
  11. 11.9.6 × 7 — where does the decimal point go? (a) 6.72 (b) 0.672 (c) 67.2 (d) 672
  12. 12.9.5 × 43 — where does the decimal point go? (a) 408.5 (b) 4085 (c) 4.085 (d) 40.85
  13. 13.0.77 × 49 — where does the decimal point go? (a) 3.773 (b) 37.73 (c) 377.3 (d) 0.3773
  14. 14.0.66 × 0.2 — where does the decimal point go? (a) 0.132 (b) 1.32 (c) 0.00132 (d) 0.0132
  15. 15.4.3 × 0.7 — where does the decimal point go? (a) 30.1 (b) 0.301 (c) 0.0301 (d) 3.01
  16. 16.2.8 × 7 — where does the decimal point go? (a) 0.196 (b) 1.96 (c) 19.6 (d) 196
  17. 17.3.3 × 45 — where does the decimal point go? (a) 1485 (b) 1.485 (c) 14.85 (d) 148.5
  18. 18.0.21 × 23 — where does the decimal point go? (a) 4.83 (b) 48.3 (c) 0.0483 (d) 0.483
  19. 19.1.9 × 2 — where does the decimal point go? (a) 0.038 (b) 38 (c) 0.38 (d) 3.8
  20. 20.1.3 × 29 — where does the decimal point go? (a) 3.77 (b) 377 (c) 37.7 (d) 0.377
  21. 21.3.4 × 8 — where does the decimal point go? (a) 2.72 (b) 0.272 (c) 272 (d) 27.2
  22. 22.7.6 × 3 — where does the decimal point go? (a) 22.8 (b) 228 (c) 2.28 (d) 0.228
  23. 23.5.3 × 0.7 — where does the decimal point go? (a) 3.71 (b) 37.1 (c) 0.0371 (d) 0.371
  24. 24.5.6 × 4 — where does the decimal point go? (a) 2.24 (b) 0.224 (c) 224 (d) 22.4
  25. 25.0.23 × 1.6 — where does the decimal point go? (a) 0.368 (b) 0.00368 (c) 0.0368 (d) 3.68
  26. 26.9.6 × 24 — where does the decimal point go? (a) 2.304 (b) 230.4 (c) 2304 (d) 23.04
  27. 27.8.6 × 14 — where does the decimal point go? (a) 1.204 (b) 1204 (c) 120.4 (d) 12.04
  28. 28.1.5 × 0.7 — where does the decimal point go? (a) 0.0105 (b) 10.5 (c) 0.105 (d) 1.05
  29. 29.0.99 × 8 — where does the decimal point go? (a) 79.2 (b) 0.0792 (c) 7.92 (d) 0.792
  30. 30.9.8 × 3.3 — where does the decimal point go? (a) 3.234 (b) 32.34 (c) 0.3234 (d) 323.4
  31. 31.0.97 × 47 — where does the decimal point go? (a) 0.4559 (b) 455.9 (c) 45.59 (d) 4.559
  32. 32.1.8 × 0.9 — where does the decimal point go? (a) 0.162 (b) 0.0162 (c) 1.62 (d) 16.2
  33. 33.4.7 × 0.8 — where does the decimal point go? (a) 0.0376 (b) 0.376 (c) 3.76 (d) 37.6
  34. 34.0.38 × 0.8 — where does the decimal point go? (a) 0.00304 (b) 0.0304 (c) 3.04 (d) 0.304
  35. 35.2.5 × 3 — where does the decimal point go? (a) 0.075 (b) 0.75 (c) 7.5 (d) 75
  36. 36.0.27 × 1.4 — where does the decimal point go? (a) 0.378 (b) 3.78 (c) 0.0378 (d) 0.00378
  37. 37.2.1 × 2.3 — where does the decimal point go? (a) 0.0483 (b) 48.3 (c) 0.483 (d) 4.83
  38. 38.0.58 × 0.6 — where does the decimal point go? (a) 0.348 (b) 3.48 (c) 0.00348 (d) 0.0348
  39. 39.0.32 × 0.9 — where does the decimal point go? (a) 0.0288 (b) 0.288 (c) 2.88 (d) 0.00288
  40. 40.0.34 × 2 — where does the decimal point go? (a) 0.0068 (b) 0.068 (c) 6.8 (d) 0.68

Answer key

  1. 272.6
  2. 0.204
  3. 0.168
  4. 0.68
  5. 0.672
  6. 1.26
  7. 53.3
  8. 167.7
  9. 97.6
  10. 13.92
  11. 67.2
  12. 408.5
  13. 37.73
  14. 0.132
  15. 3.01
  16. 19.6
  17. 148.5
  18. 4.83
  19. 3.8
  20. 37.7
  21. 27.2
  22. 22.8
  23. 3.71
  24. 22.4
  25. 0.368
  26. 230.4
  27. 120.4
  28. 1.05
  29. 7.92
  30. 32.34
  31. 45.59
  32. 1.62
  33. 3.76
  34. 0.304
  35. 7.5
  36. 0.378
  37. 4.83
  38. 0.348
  39. 0.288
  40. 0.68

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