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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 502 · 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. 1.0.36 × 0.6 — where does the decimal point go? (a) 0.0216 (b) 2.16 (c) 0.00216 (d) 0.216
  2. 2.1.2 × 6 — where does the decimal point go? (a) 0.72 (b) 72 (c) 7.2 (d) 0.072
  3. 3.8.8 × 0.2 — where does the decimal point go? (a) 17.6 (b) 0.176 (c) 1.76 (d) 0.0176
  4. 4.3.5 × 2.5 — where does the decimal point go? (a) 87.5 (b) 0.0875 (c) 8.75 (d) 0.875
  5. 5.3.2 × 1.6 — where does the decimal point go? (a) 0.512 (b) 0.0512 (c) 5.12 (d) 51.2
  6. 6.0.46 × 2 — where does the decimal point go? (a) 0.92 (b) 0.0092 (c) 0.092 (d) 9.2
  7. 7.0.66 × 8 — where does the decimal point go? (a) 5.28 (b) 52.8 (c) 0.528 (d) 0.0528
  8. 8.0.46 × 24 — where does the decimal point go? (a) 1.104 (b) 0.1104 (c) 11.04 (d) 110.4
  9. 9.0.35 × 3 — where does the decimal point go? (a) 0.0105 (b) 1.05 (c) 0.105 (d) 10.5
  10. 10.0.14 × 2 — where does the decimal point go? (a) 0.028 (b) 2.8 (c) 0.0028 (d) 0.28
  11. 11.0.23 × 3.8 — where does the decimal point go? (a) 0.874 (b) 8.74 (c) 0.00874 (d) 0.0874
  12. 12.0.38 × 44 — where does the decimal point go? (a) 1.672 (b) 0.1672 (c) 16.72 (d) 167.2
  13. 13.0.92 × 0.2 — where does the decimal point go? (a) 0.184 (b) 0.0184 (c) 0.00184 (d) 1.84
  14. 14.8.7 × 16 — where does the decimal point go? (a) 139.2 (b) 1392 (c) 1.392 (d) 13.92
  15. 15.0.14 × 0.8 — where does the decimal point go? (a) 0.00112 (b) 1.12 (c) 0.112 (d) 0.0112
  16. 16.0.39 × 3.1 — where does the decimal point go? (a) 0.01209 (b) 0.1209 (c) 12.09 (d) 1.209
  17. 17.9.8 × 36 — where does the decimal point go? (a) 3528 (b) 35.28 (c) 3.528 (d) 352.8
  18. 18.1.5 × 2.3 — where does the decimal point go? (a) 34.5 (b) 3.45 (c) 0.0345 (d) 0.345
  19. 19.6.7 × 0.9 — where does the decimal point go? (a) 0.0603 (b) 0.603 (c) 60.3 (d) 6.03
  20. 20.7.9 × 2.8 — where does the decimal point go? (a) 2.212 (b) 0.2212 (c) 22.12 (d) 221.2
  21. 21.5.5 × 2.5 — where does the decimal point go? (a) 1.375 (b) 0.1375 (c) 13.75 (d) 137.5
  22. 22.8.8 × 23 — where does the decimal point go? (a) 20.24 (b) 2024 (c) 202.4 (d) 2.024
  23. 23.6.8 × 32 — where does the decimal point go? (a) 2.176 (b) 2176 (c) 217.6 (d) 21.76
  24. 24.4.1 × 4 — where does the decimal point go? (a) 16.4 (b) 164 (c) 1.64 (d) 0.164
  25. 25.8.1 × 1.1 — where does the decimal point go? (a) 89.1 (b) 0.891 (c) 0.0891 (d) 8.91
  26. 26.8.4 × 4.7 — where does the decimal point go? (a) 3.948 (b) 0.3948 (c) 394.8 (d) 39.48
  27. 27.0.68 × 6 — where does the decimal point go? (a) 4.08 (b) 40.8 (c) 0.408 (d) 0.0408
  28. 28.1.7 × 8 — where does the decimal point go? (a) 13.6 (b) 1.36 (c) 136 (d) 0.136
  29. 29.0.47 × 25 — where does the decimal point go? (a) 1.175 (b) 11.75 (c) 0.1175 (d) 117.5
  30. 30.0.21 × 0.8 — where does the decimal point go? (a) 0.168 (b) 0.0168 (c) 0.00168 (d) 1.68
  31. 31.0.43 × 2.3 — where does the decimal point go? (a) 0.0989 (b) 9.89 (c) 0.989 (d) 0.00989
  32. 32.6.3 × 33 — where does the decimal point go? (a) 207.9 (b) 20.79 (c) 2.079 (d) 2079
  33. 33.0.62 × 11 — where does the decimal point go? (a) 0.0682 (b) 68.2 (c) 0.682 (d) 6.82
  34. 34.9.2 × 3 — where does the decimal point go? (a) 27.6 (b) 276 (c) 2.76 (d) 0.276
  35. 35.1.6 × 4 — where does the decimal point go? (a) 0.064 (b) 0.64 (c) 6.4 (d) 64
  36. 36.0.56 × 36 — where does the decimal point go? (a) 201.6 (b) 20.16 (c) 2.016 (d) 0.2016
  37. 37.9.4 × 0.3 — where does the decimal point go? (a) 0.282 (b) 0.0282 (c) 2.82 (d) 28.2
  38. 38.0.96 × 3.3 — where does the decimal point go? (a) 3.168 (b) 0.03168 (c) 0.3168 (d) 31.68
  39. 39.1.9 × 19 — where does the decimal point go? (a) 0.361 (b) 361 (c) 36.1 (d) 3.61
  40. 40.9.8 × 31 — where does the decimal point go? (a) 3038 (b) 303.8 (c) 3.038 (d) 30.38

Answer key

  1. 0.216
  2. 7.2
  3. 1.76
  4. 8.75
  5. 5.12
  6. 0.92
  7. 5.28
  8. 11.04
  9. 1.05
  10. 0.28
  11. 0.874
  12. 16.72
  13. 0.184
  14. 139.2
  15. 0.112
  16. 1.209
  17. 352.8
  18. 3.45
  19. 6.03
  20. 22.12
  21. 13.75
  22. 202.4
  23. 217.6
  24. 16.4
  25. 8.91
  26. 39.48
  27. 4.08
  28. 13.6
  29. 11.75
  30. 0.168
  31. 0.989
  32. 207.9
  33. 6.82
  34. 27.6
  35. 6.4
  36. 20.16
  37. 2.82
  38. 3.168
  39. 36.1
  40. 303.8

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