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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 146 · 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. 1.4.6 × 2 — where does the decimal point go? (a) 0.092 (b) 0.92 (c) 9.2 (d) 92
  2. 2.6.1 × 2.3 — where does the decimal point go? (a) 1.403 (b) 140.3 (c) 14.03 (d) 0.1403
  3. 3.0.23 × 6 — where does the decimal point go? (a) 13.8 (b) 1.38 (c) 0.0138 (d) 0.138
  4. 4.7.6 × 0.9 — where does the decimal point go? (a) 0.0684 (b) 0.684 (c) 6.84 (d) 68.4
  5. 5.5.9 × 0.8 — where does the decimal point go? (a) 0.472 (b) 0.0472 (c) 4.72 (d) 47.2
  6. 6.5.7 × 4 — where does the decimal point go? (a) 22.8 (b) 2.28 (c) 0.228 (d) 228
  7. 7.3.5 × 7 — where does the decimal point go? (a) 24.5 (b) 0.245 (c) 245 (d) 2.45
  8. 8.5.4 × 3.7 — where does the decimal point go? (a) 19.98 (b) 199.8 (c) 0.1998 (d) 1.998
  9. 9.0.15 × 27 — where does the decimal point go? (a) 0.0405 (b) 4.05 (c) 40.5 (d) 0.405
  10. 10.0.21 × 9 — where does the decimal point go? (a) 0.189 (b) 0.0189 (c) 18.9 (d) 1.89
  11. 11.5.2 × 0.2 — where does the decimal point go? (a) 0.104 (b) 10.4 (c) 0.0104 (d) 1.04
  12. 12.1.5 × 0.5 — where does the decimal point go? (a) 0.75 (b) 0.075 (c) 7.5 (d) 0.0075
  13. 13.7.9 × 0.3 — where does the decimal point go? (a) 2.37 (b) 0.237 (c) 0.0237 (d) 23.7
  14. 14.8.4 × 3.6 — where does the decimal point go? (a) 3.024 (b) 302.4 (c) 30.24 (d) 0.3024
  15. 15.0.68 × 2.3 — where does the decimal point go? (a) 0.1564 (b) 0.01564 (c) 1.564 (d) 15.64
  16. 16.6.2 × 0.7 — where does the decimal point go? (a) 0.0434 (b) 43.4 (c) 0.434 (d) 4.34
  17. 17.2.1 × 6 — where does the decimal point go? (a) 1.26 (b) 0.126 (c) 12.6 (d) 126
  18. 18.0.48 × 0.4 — where does the decimal point go? (a) 0.0192 (b) 1.92 (c) 0.00192 (d) 0.192
  19. 19.4.5 × 3 — where does the decimal point go? (a) 1.35 (b) 13.5 (c) 135 (d) 0.135
  20. 20.0.91 × 6 — where does the decimal point go? (a) 0.546 (b) 5.46 (c) 0.0546 (d) 54.6
  21. 21.6.8 × 41 — where does the decimal point go? (a) 2.788 (b) 2788 (c) 27.88 (d) 278.8
  22. 22.0.55 × 1.3 — where does the decimal point go? (a) 0.00715 (b) 0.0715 (c) 7.15 (d) 0.715
  23. 23.0.49 × 1.7 — where does the decimal point go? (a) 8.33 (b) 0.833 (c) 0.0833 (d) 0.00833
  24. 24.8.6 × 0.3 — where does the decimal point go? (a) 25.8 (b) 0.258 (c) 2.58 (d) 0.0258
  25. 25.0.59 × 48 — where does the decimal point go? (a) 283.2 (b) 2.832 (c) 28.32 (d) 0.2832
  26. 26.5.3 × 0.5 — where does the decimal point go? (a) 2.65 (b) 26.5 (c) 0.265 (d) 0.0265
  27. 27.2.6 × 0.3 — where does the decimal point go? (a) 0.78 (b) 0.0078 (c) 0.078 (d) 7.8
  28. 28.8.9 × 0.2 — where does the decimal point go? (a) 0.178 (b) 17.8 (c) 1.78 (d) 0.0178
  29. 29.0.58 × 43 — where does the decimal point go? (a) 24.94 (b) 0.2494 (c) 2.494 (d) 249.4
  30. 30.6.8 × 0.3 — where does the decimal point go? (a) 2.04 (b) 0.204 (c) 20.4 (d) 0.0204
  31. 31.7.3 × 4 — where does the decimal point go? (a) 29.2 (b) 292 (c) 2.92 (d) 0.292
  32. 32.4.9 × 4 — where does the decimal point go? (a) 0.196 (b) 196 (c) 19.6 (d) 1.96
  33. 33.0.65 × 4.7 — where does the decimal point go? (a) 0.03055 (b) 0.3055 (c) 30.55 (d) 3.055
  34. 34.0.23 × 9 — where does the decimal point go? (a) 0.207 (b) 0.0207 (c) 20.7 (d) 2.07
  35. 35.5.6 × 0.2 — where does the decimal point go? (a) 0.112 (b) 1.12 (c) 0.0112 (d) 11.2
  36. 36.0.39 × 18 — where does the decimal point go? (a) 70.2 (b) 0.702 (c) 0.0702 (d) 7.02
  37. 37.2.9 × 4.7 — where does the decimal point go? (a) 13.63 (b) 1.363 (c) 0.1363 (d) 136.3
  38. 38.0.27 × 36 — where does the decimal point go? (a) 0.972 (b) 9.72 (c) 0.0972 (d) 97.2
  39. 39.2.4 × 1.8 — where does the decimal point go? (a) 43.2 (b) 4.32 (c) 0.432 (d) 0.0432
  40. 40.0.86 × 12 — where does the decimal point go? (a) 0.1032 (b) 103.2 (c) 1.032 (d) 10.32

Answer key

  1. 9.2
  2. 14.03
  3. 1.38
  4. 6.84
  5. 4.72
  6. 22.8
  7. 24.5
  8. 19.98
  9. 4.05
  10. 1.89
  11. 1.04
  12. 0.75
  13. 2.37
  14. 30.24
  15. 1.564
  16. 4.34
  17. 12.6
  18. 0.192
  19. 13.5
  20. 5.46
  21. 278.8
  22. 0.715
  23. 0.833
  24. 2.58
  25. 28.32
  26. 2.65
  27. 0.78
  28. 1.78
  29. 24.94
  30. 2.04
  31. 29.2
  32. 19.6
  33. 3.055
  34. 2.07
  35. 1.12
  36. 7.02
  37. 13.63
  38. 9.72
  39. 4.32
  40. 10.32

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