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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 173 · 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. 1.0.38 × 0.8 — where does the decimal point go? (a) 0.0304 (b) 0.304 (c) 0.00304 (d) 3.04
  2. 2.0.67 × 0.6 — where does the decimal point go? (a) 0.402 (b) 0.00402 (c) 0.0402 (d) 4.02
  3. 3.0.13 × 2 — where does the decimal point go? (a) 0.0026 (b) 0.026 (c) 0.26 (d) 2.6
  4. 4.9.9 × 9 — where does the decimal point go? (a) 8.91 (b) 89.1 (c) 0.891 (d) 891
  5. 5.2.1 × 13 — where does the decimal point go? (a) 0.273 (b) 273 (c) 2.73 (d) 27.3
  6. 6.3.9 × 1.6 — where does the decimal point go? (a) 6.24 (b) 0.0624 (c) 0.624 (d) 62.4
  7. 7.0.93 × 0.9 — where does the decimal point go? (a) 0.0837 (b) 8.37 (c) 0.837 (d) 0.00837
  8. 8.3.1 × 42 — where does the decimal point go? (a) 1.302 (b) 13.02 (c) 130.2 (d) 1302
  9. 9.0.13 × 7 — where does the decimal point go? (a) 9.1 (b) 0.091 (c) 0.91 (d) 0.0091
  10. 10.0.32 × 3 — where does the decimal point go? (a) 0.096 (b) 0.0096 (c) 9.6 (d) 0.96
  11. 11.0.52 × 0.4 — where does the decimal point go? (a) 0.0208 (b) 0.208 (c) 0.00208 (d) 2.08
  12. 12.3.1 × 2 — where does the decimal point go? (a) 0.62 (b) 6.2 (c) 0.062 (d) 62
  13. 13.6.9 × 4 — where does the decimal point go? (a) 2.76 (b) 27.6 (c) 276 (d) 0.276
  14. 14.2.3 × 0.6 — where does the decimal point go? (a) 0.0138 (b) 13.8 (c) 0.138 (d) 1.38
  15. 15.8.7 × 3.3 — where does the decimal point go? (a) 0.2871 (b) 28.71 (c) 287.1 (d) 2.871
  16. 16.8.7 × 1.3 — where does the decimal point go? (a) 113.1 (b) 11.31 (c) 0.1131 (d) 1.131
  17. 17.1.6 × 2.7 — where does the decimal point go? (a) 4.32 (b) 0.0432 (c) 43.2 (d) 0.432
  18. 18.3.8 × 27 — where does the decimal point go? (a) 10.26 (b) 102.6 (c) 1026 (d) 1.026
  19. 19.6.6 × 6 — where does the decimal point go? (a) 396 (b) 39.6 (c) 3.96 (d) 0.396
  20. 20.8.8 × 0.3 — where does the decimal point go? (a) 0.264 (b) 26.4 (c) 2.64 (d) 0.0264
  21. 21.0.68 × 7 — where does the decimal point go? (a) 47.6 (b) 0.476 (c) 4.76 (d) 0.0476
  22. 22.0.29 × 48 — where does the decimal point go? (a) 0.1392 (b) 13.92 (c) 139.2 (d) 1.392
  23. 23.0.53 × 0.3 — where does the decimal point go? (a) 1.59 (b) 0.0159 (c) 0.159 (d) 0.00159
  24. 24.8.7 × 3.6 — where does the decimal point go? (a) 0.3132 (b) 31.32 (c) 3.132 (d) 313.2
  25. 25.0.69 × 4.5 — where does the decimal point go? (a) 0.03105 (b) 31.05 (c) 0.3105 (d) 3.105
  26. 26.0.77 × 34 — where does the decimal point go? (a) 261.8 (b) 2.618 (c) 0.2618 (d) 26.18
  27. 27.4.9 × 0.9 — where does the decimal point go? (a) 44.1 (b) 0.0441 (c) 0.441 (d) 4.41
  28. 28.0.21 × 3.1 — where does the decimal point go? (a) 6.51 (b) 0.0651 (c) 0.00651 (d) 0.651
  29. 29.6.9 × 0.9 — where does the decimal point go? (a) 0.621 (b) 0.0621 (c) 6.21 (d) 62.1
  30. 30.0.12 × 6 — where does the decimal point go? (a) 0.072 (b) 7.2 (c) 0.72 (d) 0.0072
  31. 31.0.63 × 8 — where does the decimal point go? (a) 0.504 (b) 0.0504 (c) 50.4 (d) 5.04
  32. 32.1.8 × 3.8 — where does the decimal point go? (a) 68.4 (b) 0.684 (c) 6.84 (d) 0.0684
  33. 33.5.6 × 0.7 — where does the decimal point go? (a) 39.2 (b) 0.0392 (c) 3.92 (d) 0.392
  34. 34.0.53 × 3 — where does the decimal point go? (a) 0.159 (b) 0.0159 (c) 1.59 (d) 15.9
  35. 35.3.4 × 2 — where does the decimal point go? (a) 6.8 (b) 0.068 (c) 68 (d) 0.68
  36. 36.2.9 × 0.2 — where does the decimal point go? (a) 0.58 (b) 0.0058 (c) 5.8 (d) 0.058
  37. 37.4.4 × 9 — where does the decimal point go? (a) 39.6 (b) 396 (c) 3.96 (d) 0.396
  38. 38.0.99 × 0.2 — where does the decimal point go? (a) 0.198 (b) 0.0198 (c) 1.98 (d) 0.00198
  39. 39.0.69 × 0.4 — where does the decimal point go? (a) 0.0276 (b) 0.00276 (c) 2.76 (d) 0.276
  40. 40.0.17 × 7 — where does the decimal point go? (a) 0.119 (b) 1.19 (c) 11.9 (d) 0.0119

Answer key

  1. 0.304
  2. 0.402
  3. 0.26
  4. 89.1
  5. 27.3
  6. 6.24
  7. 0.837
  8. 130.2
  9. 0.91
  10. 0.96
  11. 0.208
  12. 6.2
  13. 27.6
  14. 1.38
  15. 28.71
  16. 11.31
  17. 4.32
  18. 102.6
  19. 39.6
  20. 2.64
  21. 4.76
  22. 13.92
  23. 0.159
  24. 31.32
  25. 3.105
  26. 26.18
  27. 4.41
  28. 0.651
  29. 6.21
  30. 0.72
  31. 5.04
  32. 6.84
  33. 3.92
  34. 1.59
  35. 6.8
  36. 0.58
  37. 39.6
  38. 0.198
  39. 0.276
  40. 1.19

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