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

Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 145 · 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. 1.0.82 × 0.3 — where does the decimal point go? (a) 0.00246 (b) 2.46 (c) 0.246 (d) 0.0246
  2. 2.9.7 × 2 — where does the decimal point go? (a) 0.194 (b) 1.94 (c) 19.4 (d) 194
  3. 3.2.8 × 0.6 — where does the decimal point go? (a) 1.68 (b) 0.0168 (c) 0.168 (d) 16.8
  4. 4.5.9 × 14 — where does the decimal point go? (a) 826 (b) 0.826 (c) 8.26 (d) 82.6
  5. 5.1.9 × 21 — where does the decimal point go? (a) 39.9 (b) 0.399 (c) 399 (d) 3.99
  6. 6.1.9 × 2 — where does the decimal point go? (a) 38 (b) 0.038 (c) 3.8 (d) 0.38
  7. 7.1.8 × 8 — where does the decimal point go? (a) 1.44 (b) 144 (c) 0.144 (d) 14.4
  8. 8.1.2 × 0.6 — where does the decimal point go? (a) 0.072 (b) 7.2 (c) 0.0072 (d) 0.72
  9. 9.7.7 × 41 — where does the decimal point go? (a) 31.57 (b) 315.7 (c) 3157 (d) 3.157
  10. 10.0.86 × 48 — where does the decimal point go? (a) 41.28 (b) 4.128 (c) 0.4128 (d) 412.8
  11. 11.4.2 × 0.3 — where does the decimal point go? (a) 1.26 (b) 0.0126 (c) 0.126 (d) 12.6
  12. 12.2.2 × 46 — where does the decimal point go? (a) 1.012 (b) 10.12 (c) 1012 (d) 101.2
  13. 13.7.4 × 7 — where does the decimal point go? (a) 518 (b) 0.518 (c) 51.8 (d) 5.18
  14. 14.0.53 × 0.9 — where does the decimal point go? (a) 0.0477 (b) 0.00477 (c) 4.77 (d) 0.477
  15. 15.4.7 × 24 — where does the decimal point go? (a) 1128 (b) 1.128 (c) 11.28 (d) 112.8
  16. 16.0.98 × 7 — where does the decimal point go? (a) 0.686 (b) 6.86 (c) 0.0686 (d) 68.6
  17. 17.9.4 × 44 — where does the decimal point go? (a) 41.36 (b) 4.136 (c) 413.6 (d) 4136
  18. 18.2.4 × 0.8 — where does the decimal point go? (a) 0.0192 (b) 0.192 (c) 1.92 (d) 19.2
  19. 19.5.5 × 7 — where does the decimal point go? (a) 38.5 (b) 0.385 (c) 385 (d) 3.85
  20. 20.2.2 × 0.4 — where does the decimal point go? (a) 0.088 (b) 8.8 (c) 0.88 (d) 0.0088
  21. 21.0.17 × 34 — where does the decimal point go? (a) 0.0578 (b) 57.8 (c) 0.578 (d) 5.78
  22. 22.0.58 × 3 — where does the decimal point go? (a) 0.174 (b) 0.0174 (c) 1.74 (d) 17.4
  23. 23.0.88 × 3 — where does the decimal point go? (a) 0.264 (b) 0.0264 (c) 2.64 (d) 26.4
  24. 24.0.56 × 0.2 — where does the decimal point go? (a) 0.00112 (b) 0.0112 (c) 1.12 (d) 0.112
  25. 25.1.4 × 6 — where does the decimal point go? (a) 8.4 (b) 0.84 (c) 84 (d) 0.084
  26. 26.0.42 × 43 — where does the decimal point go? (a) 0.1806 (b) 18.06 (c) 180.6 (d) 1.806
  27. 27.3.2 × 31 — where does the decimal point go? (a) 9.92 (b) 0.992 (c) 992 (d) 99.2
  28. 28.0.53 × 4 — where does the decimal point go? (a) 21.2 (b) 0.212 (c) 2.12 (d) 0.0212
  29. 29.6.6 × 0.6 — where does the decimal point go? (a) 3.96 (b) 0.396 (c) 0.0396 (d) 39.6
  30. 30.0.25 × 7 — where does the decimal point go? (a) 0.175 (b) 17.5 (c) 1.75 (d) 0.0175
  31. 31.3.3 × 0.3 — where does the decimal point go? (a) 0.99 (b) 0.0099 (c) 0.099 (d) 9.9
  32. 32.8.7 × 0.5 — where does the decimal point go? (a) 43.5 (b) 0.435 (c) 4.35 (d) 0.0435
  33. 33.0.79 × 3 — where does the decimal point go? (a) 2.37 (b) 0.0237 (c) 0.237 (d) 23.7
  34. 34.0.75 × 29 — where does the decimal point go? (a) 0.2175 (b) 217.5 (c) 2.175 (d) 21.75
  35. 35.6.8 × 3.9 — where does the decimal point go? (a) 265.2 (b) 26.52 (c) 0.2652 (d) 2.652
  36. 36.1.6 × 4 — where does the decimal point go? (a) 64 (b) 0.64 (c) 0.064 (d) 6.4
  37. 37.9.1 × 2 — where does the decimal point go? (a) 1.82 (b) 0.182 (c) 182 (d) 18.2
  38. 38.0.52 × 0.8 — where does the decimal point go? (a) 0.416 (b) 0.0416 (c) 4.16 (d) 0.00416
  39. 39.7.2 × 9 — where does the decimal point go? (a) 0.648 (b) 64.8 (c) 6.48 (d) 648
  40. 40.5.9 × 34 — where does the decimal point go? (a) 20.06 (b) 2.006 (c) 2006 (d) 200.6

Answer key

  1. 0.246
  2. 19.4
  3. 1.68
  4. 82.6
  5. 39.9
  6. 3.8
  7. 14.4
  8. 0.72
  9. 315.7
  10. 41.28
  11. 1.26
  12. 101.2
  13. 51.8
  14. 0.477
  15. 112.8
  16. 6.86
  17. 413.6
  18. 1.92
  19. 38.5
  20. 0.88
  21. 5.78
  22. 1.74
  23. 2.64
  24. 0.112
  25. 8.4
  26. 18.06
  27. 99.2
  28. 2.12
  29. 3.96
  30. 1.75
  31. 0.99
  32. 4.35
  33. 2.37
  34. 21.75
  35. 26.52
  36. 6.4
  37. 18.2
  38. 0.416
  39. 64.8
  40. 200.6

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