← Where does the decimal point go? lesson New set →

Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 442 · 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. 1.4.5 × 5 — where does the decimal point go? (a) 2.25 (b) 0.225 (c) 225 (d) 22.5
  2. 2.0.37 × 1.4 — where does the decimal point go? (a) 0.518 (b) 0.00518 (c) 5.18 (d) 0.0518
  3. 3.0.54 × 3.8 — where does the decimal point go? (a) 0.02052 (b) 0.2052 (c) 2.052 (d) 20.52
  4. 4.0.19 × 1.2 — where does the decimal point go? (a) 0.228 (b) 2.28 (c) 0.0228 (d) 0.00228
  5. 5.0.89 × 0.2 — where does the decimal point go? (a) 0.0178 (b) 0.178 (c) 1.78 (d) 0.00178
  6. 6.7.9 × 4.9 — where does the decimal point go? (a) 38.71 (b) 387.1 (c) 0.3871 (d) 3.871
  7. 7.9.3 × 0.4 — where does the decimal point go? (a) 3.72 (b) 0.0372 (c) 0.372 (d) 37.2
  8. 8.1.7 × 38 — where does the decimal point go? (a) 6.46 (b) 0.646 (c) 646 (d) 64.6
  9. 9.8.4 × 7 — where does the decimal point go? (a) 5.88 (b) 588 (c) 58.8 (d) 0.588
  10. 10.0.97 × 3.4 — where does the decimal point go? (a) 32.98 (b) 0.3298 (c) 3.298 (d) 0.03298
  11. 11.0.99 × 0.8 — where does the decimal point go? (a) 7.92 (b) 0.0792 (c) 0.792 (d) 0.00792
  12. 12.7.3 × 1.2 — where does the decimal point go? (a) 8.76 (b) 0.876 (c) 0.0876 (d) 87.6
  13. 13.4.3 × 0.7 — where does the decimal point go? (a) 30.1 (b) 0.0301 (c) 3.01 (d) 0.301
  14. 14.3.2 × 6 — where does the decimal point go? (a) 19.2 (b) 192 (c) 0.192 (d) 1.92
  15. 15.8.5 × 1.3 — where does the decimal point go? (a) 11.05 (b) 110.5 (c) 0.1105 (d) 1.105
  16. 16.0.86 × 8 — where does the decimal point go? (a) 6.88 (b) 0.688 (c) 68.8 (d) 0.0688
  17. 17.5.8 × 12 — where does the decimal point go? (a) 0.696 (b) 6.96 (c) 69.6 (d) 696
  18. 18.8.5 × 23 — where does the decimal point go? (a) 19.55 (b) 195.5 (c) 1.955 (d) 1955
  19. 19.0.37 × 0.4 — where does the decimal point go? (a) 0.148 (b) 1.48 (c) 0.00148 (d) 0.0148
  20. 20.0.81 × 0.3 — where does the decimal point go? (a) 0.243 (b) 0.00243 (c) 0.0243 (d) 2.43
  21. 21.0.17 × 0.3 — where does the decimal point go? (a) 0.00051 (b) 0.51 (c) 0.051 (d) 0.0051
  22. 22.9.9 × 8 — where does the decimal point go? (a) 79.2 (b) 7.92 (c) 792 (d) 0.792
  23. 23.9.3 × 0.7 — where does the decimal point go? (a) 0.0651 (b) 65.1 (c) 0.651 (d) 6.51
  24. 24.1.2 × 0.7 — where does the decimal point go? (a) 8.4 (b) 0.0084 (c) 0.84 (d) 0.084
  25. 25.0.58 × 3.3 — where does the decimal point go? (a) 19.14 (b) 1.914 (c) 0.1914 (d) 0.01914
  26. 26.0.62 × 0.4 — where does the decimal point go? (a) 0.00248 (b) 0.248 (c) 2.48 (d) 0.0248
  27. 27.4.7 × 21 — where does the decimal point go? (a) 0.987 (b) 987 (c) 98.7 (d) 9.87
  28. 28.8.8 × 9 — where does the decimal point go? (a) 7.92 (b) 0.792 (c) 792 (d) 79.2
  29. 29.9.6 × 3 — where does the decimal point go? (a) 0.288 (b) 288 (c) 2.88 (d) 28.8
  30. 30.0.66 × 0.4 — where does the decimal point go? (a) 0.264 (b) 0.0264 (c) 0.00264 (d) 2.64
  31. 31.7.2 × 4.9 — where does the decimal point go? (a) 35.28 (b) 0.3528 (c) 352.8 (d) 3.528
  32. 32.3.8 × 3 — where does the decimal point go? (a) 0.114 (b) 114 (c) 11.4 (d) 1.14
  33. 33.5.4 × 37 — where does the decimal point go? (a) 199.8 (b) 19.98 (c) 1.998 (d) 1998
  34. 34.5.8 × 0.7 — where does the decimal point go? (a) 0.406 (b) 4.06 (c) 0.0406 (d) 40.6
  35. 35.0.31 × 0.7 — where does the decimal point go? (a) 0.217 (b) 0.0217 (c) 0.00217 (d) 2.17
  36. 36.0.44 × 2 — where does the decimal point go? (a) 0.88 (b) 0.088 (c) 0.0088 (d) 8.8
  37. 37.2.2 × 6 — where does the decimal point go? (a) 13.2 (b) 1.32 (c) 0.132 (d) 132
  38. 38.0.31 × 35 — where does the decimal point go? (a) 1.085 (b) 10.85 (c) 108.5 (d) 0.1085
  39. 39.0.32 × 26 — where does the decimal point go? (a) 0.0832 (b) 8.32 (c) 0.832 (d) 83.2
  40. 40.1.5 × 45 — where does the decimal point go? (a) 67.5 (b) 0.675 (c) 675 (d) 6.75

Answer key

  1. 22.5
  2. 0.518
  3. 2.052
  4. 0.228
  5. 0.178
  6. 38.71
  7. 3.72
  8. 64.6
  9. 58.8
  10. 3.298
  11. 0.792
  12. 8.76
  13. 3.01
  14. 19.2
  15. 11.05
  16. 6.88
  17. 69.6
  18. 195.5
  19. 0.148
  20. 0.243
  21. 0.051
  22. 79.2
  23. 6.51
  24. 0.84
  25. 1.914
  26. 0.248
  27. 98.7
  28. 79.2
  29. 28.8
  30. 0.264
  31. 35.28
  32. 11.4
  33. 199.8
  34. 4.06
  35. 0.217
  36. 0.88
  37. 13.2
  38. 10.85
  39. 8.32
  40. 67.5

Free maths tricks lessons, practice and worksheets at talentjr.in/maths-tricks