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

Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 930 · 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. 1.4.7 × 4.5 — where does the decimal point go? (a) 211.5 (b) 0.2115 (c) 21.15 (d) 2.115
  2. 2.0.29 × 0.9 — where does the decimal point go? (a) 0.261 (b) 0.00261 (c) 0.0261 (d) 2.61
  3. 3.0.68 × 3.4 — where does the decimal point go? (a) 2.312 (b) 0.02312 (c) 23.12 (d) 0.2312
  4. 4.0.54 × 9 — where does the decimal point go? (a) 4.86 (b) 48.6 (c) 0.0486 (d) 0.486
  5. 5.0.79 × 5 — where does the decimal point go? (a) 39.5 (b) 0.395 (c) 0.0395 (d) 3.95
  6. 6.5.2 × 6 — where does the decimal point go? (a) 3.12 (b) 0.312 (c) 31.2 (d) 312
  7. 7.1.8 × 0.8 — where does the decimal point go? (a) 1.44 (b) 0.144 (c) 14.4 (d) 0.0144
  8. 8.8.6 × 0.3 — where does the decimal point go? (a) 0.0258 (b) 25.8 (c) 0.258 (d) 2.58
  9. 9.7.3 × 3.8 — where does the decimal point go? (a) 0.2774 (b) 277.4 (c) 27.74 (d) 2.774
  10. 10.0.31 × 35 — where does the decimal point go? (a) 0.1085 (b) 1.085 (c) 108.5 (d) 10.85
  11. 11.9.6 × 6 — where does the decimal point go? (a) 576 (b) 0.576 (c) 5.76 (d) 57.6
  12. 12.4.9 × 12 — where does the decimal point go? (a) 58.8 (b) 5.88 (c) 0.588 (d) 588
  13. 13.2.7 × 5 — where does the decimal point go? (a) 135 (b) 13.5 (c) 1.35 (d) 0.135
  14. 14.3.8 × 41 — where does the decimal point go? (a) 155.8 (b) 1558 (c) 1.558 (d) 15.58
  15. 15.0.53 × 7 — where does the decimal point go? (a) 3.71 (b) 0.371 (c) 37.1 (d) 0.0371
  16. 16.1.4 × 0.4 — where does the decimal point go? (a) 0.0056 (b) 0.056 (c) 0.56 (d) 5.6
  17. 17.1.9 × 48 — where does the decimal point go? (a) 912 (b) 91.2 (c) 0.912 (d) 9.12
  18. 18.3.4 × 0.9 — where does the decimal point go? (a) 30.6 (b) 3.06 (c) 0.0306 (d) 0.306
  19. 19.0.93 × 3.1 — where does the decimal point go? (a) 0.02883 (b) 2.883 (c) 0.2883 (d) 28.83
  20. 20.0.99 × 0.4 — where does the decimal point go? (a) 3.96 (b) 0.00396 (c) 0.396 (d) 0.0396
  21. 21.0.16 × 7 — where does the decimal point go? (a) 0.0112 (b) 11.2 (c) 0.112 (d) 1.12
  22. 22.8.5 × 41 — where does the decimal point go? (a) 348.5 (b) 3.485 (c) 3485 (d) 34.85
  23. 23.0.91 × 0.2 — where does the decimal point go? (a) 0.182 (b) 0.0182 (c) 1.82 (d) 0.00182
  24. 24.9.7 × 42 — where does the decimal point go? (a) 407.4 (b) 40.74 (c) 4.074 (d) 4074
  25. 25.0.28 × 4 — where does the decimal point go? (a) 0.112 (b) 0.0112 (c) 1.12 (d) 11.2
  26. 26.1.6 × 7 — where does the decimal point go? (a) 1.12 (b) 0.112 (c) 112 (d) 11.2
  27. 27.0.18 × 4 — where does the decimal point go? (a) 0.072 (b) 0.72 (c) 0.0072 (d) 7.2
  28. 28.0.48 × 3 — where does the decimal point go? (a) 0.0144 (b) 14.4 (c) 1.44 (d) 0.144
  29. 29.0.78 × 3.2 — where does the decimal point go? (a) 0.02496 (b) 2.496 (c) 0.2496 (d) 24.96
  30. 30.0.18 × 29 — where does the decimal point go? (a) 52.2 (b) 0.522 (c) 0.0522 (d) 5.22
  31. 31.1.3 × 9 — where does the decimal point go? (a) 1.17 (b) 117 (c) 11.7 (d) 0.117
  32. 32.7.8 × 21 — where does the decimal point go? (a) 1638 (b) 16.38 (c) 1.638 (d) 163.8
  33. 33.5.6 × 1.8 — where does the decimal point go? (a) 10.08 (b) 1.008 (c) 0.1008 (d) 100.8
  34. 34.0.91 × 33 — where does the decimal point go? (a) 30.03 (b) 300.3 (c) 0.3003 (d) 3.003
  35. 35.0.57 × 2 — where does the decimal point go? (a) 1.14 (b) 0.0114 (c) 11.4 (d) 0.114
  36. 36.3.9 × 1.6 — where does the decimal point go? (a) 62.4 (b) 6.24 (c) 0.0624 (d) 0.624
  37. 37.1.6 × 22 — where does the decimal point go? (a) 3.52 (b) 35.2 (c) 352 (d) 0.352
  38. 38.8.1 × 0.9 — where does the decimal point go? (a) 7.29 (b) 0.0729 (c) 72.9 (d) 0.729
  39. 39.0.52 × 6 — where does the decimal point go? (a) 0.0312 (b) 0.312 (c) 3.12 (d) 31.2
  40. 40.9.6 × 2 — where does the decimal point go? (a) 192 (b) 0.192 (c) 19.2 (d) 1.92

Answer key

  1. 21.15
  2. 0.261
  3. 2.312
  4. 4.86
  5. 3.95
  6. 31.2
  7. 1.44
  8. 2.58
  9. 27.74
  10. 10.85
  11. 57.6
  12. 58.8
  13. 13.5
  14. 155.8
  15. 3.71
  16. 0.56
  17. 91.2
  18. 3.06
  19. 2.883
  20. 0.396
  21. 1.12
  22. 348.5
  23. 0.182
  24. 407.4
  25. 1.12
  26. 11.2
  27. 0.72
  28. 1.44
  29. 2.496
  30. 5.22
  31. 11.7
  32. 163.8
  33. 10.08
  34. 30.03
  35. 1.14
  36. 6.24
  37. 35.2
  38. 7.29
  39. 3.12
  40. 19.2

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