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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 497 · 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. 1.0.88 × 0.2 — where does the decimal point go? (a) 0.176 (b) 1.76 (c) 0.00176 (d) 0.0176
  2. 2.0.17 × 39 — where does the decimal point go? (a) 6.63 (b) 0.0663 (c) 66.3 (d) 0.663
  3. 3.2.7 × 2 — where does the decimal point go? (a) 0.054 (b) 54 (c) 0.54 (d) 5.4
  4. 4.3.3 × 2.6 — where does the decimal point go? (a) 8.58 (b) 0.858 (c) 85.8 (d) 0.0858
  5. 5.0.29 × 2.2 — where does the decimal point go? (a) 0.0638 (b) 0.00638 (c) 0.638 (d) 6.38
  6. 6.0.97 × 3 — where does the decimal point go? (a) 2.91 (b) 29.1 (c) 0.291 (d) 0.0291
  7. 7.0.17 × 7 — where does the decimal point go? (a) 1.19 (b) 0.119 (c) 11.9 (d) 0.0119
  8. 8.8.9 × 42 — where does the decimal point go? (a) 37.38 (b) 373.8 (c) 3.738 (d) 3738
  9. 9.7.5 × 29 — where does the decimal point go? (a) 21.75 (b) 2.175 (c) 2175 (d) 217.5
  10. 10.2.5 × 49 — where does the decimal point go? (a) 122.5 (b) 1.225 (c) 1225 (d) 12.25
  11. 11.1.2 × 19 — where does the decimal point go? (a) 2.28 (b) 228 (c) 22.8 (d) 0.228
  12. 12.5.4 × 0.6 — where does the decimal point go? (a) 32.4 (b) 0.324 (c) 3.24 (d) 0.0324
  13. 13.0.37 × 1.9 — where does the decimal point go? (a) 0.0703 (b) 7.03 (c) 0.703 (d) 0.00703
  14. 14.7.1 × 0.7 — where does the decimal point go? (a) 0.0497 (b) 49.7 (c) 4.97 (d) 0.497
  15. 15.4.7 × 0.4 — where does the decimal point go? (a) 0.0188 (b) 18.8 (c) 1.88 (d) 0.188
  16. 16.4.4 × 16 — where does the decimal point go? (a) 0.704 (b) 704 (c) 7.04 (d) 70.4
  17. 17.6.2 × 8 — where does the decimal point go? (a) 4.96 (b) 0.496 (c) 49.6 (d) 496
  18. 18.7.4 × 0.4 — where does the decimal point go? (a) 0.296 (b) 29.6 (c) 0.0296 (d) 2.96
  19. 19.2.1 × 18 — where does the decimal point go? (a) 37.8 (b) 3.78 (c) 378 (d) 0.378
  20. 20.0.53 × 0.8 — where does the decimal point go? (a) 0.424 (b) 4.24 (c) 0.0424 (d) 0.00424
  21. 21.0.36 × 0.3 — where does the decimal point go? (a) 1.08 (b) 0.00108 (c) 0.0108 (d) 0.108
  22. 22.7.5 × 0.9 — where does the decimal point go? (a) 0.675 (b) 6.75 (c) 67.5 (d) 0.0675
  23. 23.5.8 × 12 — where does the decimal point go? (a) 6.96 (b) 69.6 (c) 696 (d) 0.696
  24. 24.1.4 × 24 — where does the decimal point go? (a) 33.6 (b) 3.36 (c) 0.336 (d) 336
  25. 25.8.4 × 6 — where does the decimal point go? (a) 50.4 (b) 5.04 (c) 504 (d) 0.504
  26. 26.0.48 × 4.4 — where does the decimal point go? (a) 2.112 (b) 0.02112 (c) 21.12 (d) 0.2112
  27. 27.0.88 × 3 — where does the decimal point go? (a) 26.4 (b) 0.264 (c) 2.64 (d) 0.0264
  28. 28.0.76 × 0.2 — where does the decimal point go? (a) 0.00152 (b) 0.0152 (c) 0.152 (d) 1.52
  29. 29.4.4 × 7 — where does the decimal point go? (a) 0.308 (b) 308 (c) 3.08 (d) 30.8
  30. 30.3.5 × 3 — where does the decimal point go? (a) 10.5 (b) 105 (c) 0.105 (d) 1.05
  31. 31.9.9 × 1.3 — where does the decimal point go? (a) 0.1287 (b) 128.7 (c) 12.87 (d) 1.287
  32. 32.0.86 × 0.3 — where does the decimal point go? (a) 0.0258 (b) 2.58 (c) 0.00258 (d) 0.258
  33. 33.0.68 × 3.1 — where does the decimal point go? (a) 21.08 (b) 0.02108 (c) 0.2108 (d) 2.108
  34. 34.7.2 × 47 — where does the decimal point go? (a) 3.384 (b) 33.84 (c) 338.4 (d) 3384
  35. 35.3.1 × 0.6 — where does the decimal point go? (a) 0.186 (b) 18.6 (c) 0.0186 (d) 1.86
  36. 36.5.1 × 9 — where does the decimal point go? (a) 45.9 (b) 4.59 (c) 0.459 (d) 459
  37. 37.7.7 × 2 — where does the decimal point go? (a) 154 (b) 15.4 (c) 0.154 (d) 1.54
  38. 38.3.7 × 4 — where does the decimal point go? (a) 1.48 (b) 0.148 (c) 148 (d) 14.8
  39. 39.5.2 × 0.6 — where does the decimal point go? (a) 3.12 (b) 0.312 (c) 31.2 (d) 0.0312
  40. 40.4.2 × 27 — where does the decimal point go? (a) 11.34 (b) 1.134 (c) 1134 (d) 113.4

Answer key

  1. 0.176
  2. 6.63
  3. 5.4
  4. 8.58
  5. 0.638
  6. 2.91
  7. 1.19
  8. 373.8
  9. 217.5
  10. 122.5
  11. 22.8
  12. 3.24
  13. 0.703
  14. 4.97
  15. 1.88
  16. 70.4
  17. 49.6
  18. 2.96
  19. 37.8
  20. 0.424
  21. 0.108
  22. 6.75
  23. 69.6
  24. 33.6
  25. 50.4
  26. 2.112
  27. 2.64
  28. 0.152
  29. 30.8
  30. 10.5
  31. 12.87
  32. 0.258
  33. 2.108
  34. 338.4
  35. 1.86
  36. 45.9
  37. 15.4
  38. 14.8
  39. 3.12
  40. 113.4

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