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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 220 · 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. 1.2.1 × 34 — where does the decimal point go? (a) 71.4 (b) 7.14 (c) 0.714 (d) 714
  2. 2.0.41 × 2.6 — where does the decimal point go? (a) 1.066 (b) 0.01066 (c) 0.1066 (d) 10.66
  3. 3.8.1 × 1.3 — where does the decimal point go? (a) 105.3 (b) 0.1053 (c) 10.53 (d) 1.053
  4. 4.3.2 × 1.6 — where does the decimal point go? (a) 51.2 (b) 0.0512 (c) 0.512 (d) 5.12
  5. 5.0.47 × 0.7 — where does the decimal point go? (a) 0.0329 (b) 0.00329 (c) 0.329 (d) 3.29
  6. 6.7.7 × 0.6 — where does the decimal point go? (a) 46.2 (b) 0.462 (c) 4.62 (d) 0.0462
  7. 7.5.3 × 0.9 — where does the decimal point go? (a) 47.7 (b) 0.0477 (c) 4.77 (d) 0.477
  8. 8.0.28 × 0.8 — where does the decimal point go? (a) 0.00224 (b) 0.224 (c) 2.24 (d) 0.0224
  9. 9.4.7 × 0.6 — where does the decimal point go? (a) 0.0282 (b) 28.2 (c) 0.282 (d) 2.82
  10. 10.2.9 × 7 — where does the decimal point go? (a) 0.203 (b) 20.3 (c) 2.03 (d) 203
  11. 11.0.75 × 15 — where does the decimal point go? (a) 0.1125 (b) 11.25 (c) 112.5 (d) 1.125
  12. 12.6.8 × 2.4 — where does the decimal point go? (a) 0.1632 (b) 163.2 (c) 16.32 (d) 1.632
  13. 13.0.79 × 8 — where does the decimal point go? (a) 6.32 (b) 0.632 (c) 63.2 (d) 0.0632
  14. 14.0.91 × 44 — where does the decimal point go? (a) 400.4 (b) 0.4004 (c) 40.04 (d) 4.004
  15. 15.0.67 × 5 — where does the decimal point go? (a) 3.35 (b) 0.335 (c) 33.5 (d) 0.0335
  16. 16.4.3 × 14 — where does the decimal point go? (a) 6.02 (b) 60.2 (c) 602 (d) 0.602
  17. 17.1.5 × 0.3 — where does the decimal point go? (a) 0.45 (b) 0.045 (c) 0.0045 (d) 4.5
  18. 18.6.3 × 0.5 — where does the decimal point go? (a) 0.0315 (b) 3.15 (c) 31.5 (d) 0.315
  19. 19.8.5 × 0.3 — where does the decimal point go? (a) 0.255 (b) 0.0255 (c) 2.55 (d) 25.5
  20. 20.0.41 × 35 — where does the decimal point go? (a) 14.35 (b) 143.5 (c) 1.435 (d) 0.1435
  21. 21.6.7 × 5 — where does the decimal point go? (a) 0.335 (b) 33.5 (c) 335 (d) 3.35
  22. 22.0.23 × 3.8 — where does the decimal point go? (a) 0.00874 (b) 0.0874 (c) 0.874 (d) 8.74
  23. 23.0.47 × 1.2 — where does the decimal point go? (a) 0.00564 (b) 0.0564 (c) 0.564 (d) 5.64
  24. 24.0.14 × 6 — where does the decimal point go? (a) 0.084 (b) 0.84 (c) 8.4 (d) 0.0084
  25. 25.9.2 × 3.8 — where does the decimal point go? (a) 349.6 (b) 0.3496 (c) 3.496 (d) 34.96
  26. 26.9.5 × 0.5 — where does the decimal point go? (a) 4.75 (b) 47.5 (c) 0.0475 (d) 0.475
  27. 27.0.28 × 18 — where does the decimal point go? (a) 50.4 (b) 0.504 (c) 0.0504 (d) 5.04
  28. 28.0.31 × 3.6 — where does the decimal point go? (a) 0.01116 (b) 0.1116 (c) 11.16 (d) 1.116
  29. 29.0.22 × 6 — where does the decimal point go? (a) 0.132 (b) 13.2 (c) 1.32 (d) 0.0132
  30. 30.0.62 × 6 — where does the decimal point go? (a) 3.72 (b) 37.2 (c) 0.0372 (d) 0.372
  31. 31.0.47 × 0.3 — where does the decimal point go? (a) 0.00141 (b) 1.41 (c) 0.141 (d) 0.0141
  32. 32.8.6 × 29 — where does the decimal point go? (a) 2.494 (b) 24.94 (c) 2494 (d) 249.4
  33. 33.0.28 × 0.7 — where does the decimal point go? (a) 1.96 (b) 0.0196 (c) 0.196 (d) 0.00196
  34. 34.7.6 × 32 — where does the decimal point go? (a) 2432 (b) 243.2 (c) 24.32 (d) 2.432
  35. 35.7.2 × 0.2 — where does the decimal point go? (a) 0.144 (b) 14.4 (c) 1.44 (d) 0.0144
  36. 36.0.26 × 4.9 — where does the decimal point go? (a) 0.1274 (b) 1.274 (c) 0.01274 (d) 12.74
  37. 37.1.4 × 19 — where does the decimal point go? (a) 2.66 (b) 0.266 (c) 266 (d) 26.6
  38. 38.4.1 × 0.3 — where does the decimal point go? (a) 0.123 (b) 12.3 (c) 0.0123 (d) 1.23
  39. 39.7.7 × 0.7 — where does the decimal point go? (a) 5.39 (b) 0.539 (c) 53.9 (d) 0.0539
  40. 40.6.7 × 28 — where does the decimal point go? (a) 1.876 (b) 18.76 (c) 1876 (d) 187.6

Answer key

  1. 71.4
  2. 1.066
  3. 10.53
  4. 5.12
  5. 0.329
  6. 4.62
  7. 4.77
  8. 0.224
  9. 2.82
  10. 20.3
  11. 11.25
  12. 16.32
  13. 6.32
  14. 40.04
  15. 3.35
  16. 60.2
  17. 0.45
  18. 3.15
  19. 2.55
  20. 14.35
  21. 33.5
  22. 0.874
  23. 0.564
  24. 0.84
  25. 34.96
  26. 4.75
  27. 5.04
  28. 1.116
  29. 1.32
  30. 3.72
  31. 0.141
  32. 249.4
  33. 0.196
  34. 243.2
  35. 1.44
  36. 1.274
  37. 26.6
  38. 1.23
  39. 5.39
  40. 187.6

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