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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 182 · 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. 1.0.84 × 3.7 — where does the decimal point go? (a) 3.108 (b) 0.3108 (c) 31.08 (d) 0.03108
  2. 2.8.3 × 4.7 — where does the decimal point go? (a) 0.3901 (b) 39.01 (c) 3.901 (d) 390.1
  3. 3.0.61 × 0.3 — where does the decimal point go? (a) 0.0183 (b) 0.183 (c) 1.83 (d) 0.00183
  4. 4.0.61 × 3.6 — where does the decimal point go? (a) 0.2196 (b) 2.196 (c) 21.96 (d) 0.02196
  5. 5.0.42 × 31 — where does the decimal point go? (a) 1.302 (b) 0.1302 (c) 13.02 (d) 130.2
  6. 6.9.4 × 7 — where does the decimal point go? (a) 65.8 (b) 0.658 (c) 6.58 (d) 658
  7. 7.0.16 × 1.3 — where does the decimal point go? (a) 0.208 (b) 0.0208 (c) 2.08 (d) 0.00208
  8. 8.2.8 × 9 — where does the decimal point go? (a) 0.252 (b) 252 (c) 2.52 (d) 25.2
  9. 9.0.22 × 3 — where does the decimal point go? (a) 0.066 (b) 0.0066 (c) 0.66 (d) 6.6
  10. 10.3.6 × 7 — where does the decimal point go? (a) 25.2 (b) 2.52 (c) 0.252 (d) 252
  11. 11.0.85 × 0.3 — where does the decimal point go? (a) 2.55 (b) 0.00255 (c) 0.255 (d) 0.0255
  12. 12.0.25 × 4.3 — where does the decimal point go? (a) 0.1075 (b) 10.75 (c) 1.075 (d) 0.01075
  13. 13.5.8 × 4 — where does the decimal point go? (a) 2.32 (b) 0.232 (c) 23.2 (d) 232
  14. 14.0.26 × 9 — where does the decimal point go? (a) 0.0234 (b) 0.234 (c) 2.34 (d) 23.4
  15. 15.7.5 × 4.3 — where does the decimal point go? (a) 32.25 (b) 0.3225 (c) 322.5 (d) 3.225
  16. 16.1.7 × 0.6 — where does the decimal point go? (a) 0.102 (b) 0.0102 (c) 1.02 (d) 10.2
  17. 17.0.52 × 37 — where does the decimal point go? (a) 1.924 (b) 192.4 (c) 0.1924 (d) 19.24
  18. 18.0.58 × 0.3 — where does the decimal point go? (a) 0.0174 (b) 0.00174 (c) 0.174 (d) 1.74
  19. 19.1.4 × 18 — where does the decimal point go? (a) 2.52 (b) 252 (c) 25.2 (d) 0.252
  20. 20.2.4 × 4 — where does the decimal point go? (a) 9.6 (b) 0.096 (c) 96 (d) 0.96
  21. 21.2.6 × 4.2 — where does the decimal point go? (a) 1.092 (b) 0.1092 (c) 109.2 (d) 10.92
  22. 22.0.95 × 9 — where does the decimal point go? (a) 0.855 (b) 0.0855 (c) 85.5 (d) 8.55
  23. 23.0.55 × 23 — where does the decimal point go? (a) 126.5 (b) 0.1265 (c) 12.65 (d) 1.265
  24. 24.5.1 × 0.5 — where does the decimal point go? (a) 0.255 (b) 0.0255 (c) 2.55 (d) 25.5
  25. 25.0.19 × 4.9 — where does the decimal point go? (a) 9.31 (b) 0.931 (c) 0.0931 (d) 0.00931
  26. 26.0.68 × 6 — where does the decimal point go? (a) 0.0408 (b) 40.8 (c) 4.08 (d) 0.408
  27. 27.3.7 × 16 — where does the decimal point go? (a) 5.92 (b) 59.2 (c) 592 (d) 0.592
  28. 28.0.88 × 4 — where does the decimal point go? (a) 35.2 (b) 0.352 (c) 3.52 (d) 0.0352
  29. 29.3.4 × 0.3 — where does the decimal point go? (a) 1.02 (b) 10.2 (c) 0.0102 (d) 0.102
  30. 30.0.18 × 0.9 — where does the decimal point go? (a) 0.0162 (b) 0.00162 (c) 0.162 (d) 1.62
  31. 31.0.49 × 27 — where does the decimal point go? (a) 1.323 (b) 132.3 (c) 13.23 (d) 0.1323
  32. 32.6.2 × 9 — where does the decimal point go? (a) 55.8 (b) 0.558 (c) 558 (d) 5.58
  33. 33.0.33 × 0.2 — where does the decimal point go? (a) 0.0066 (b) 0.066 (c) 0.00066 (d) 0.66
  34. 34.8.8 × 28 — where does the decimal point go? (a) 24.64 (b) 2.464 (c) 2464 (d) 246.4
  35. 35.0.25 × 25 — where does the decimal point go? (a) 0.625 (b) 0.0625 (c) 6.25 (d) 62.5
  36. 36.3.3 × 1.5 — where does the decimal point go? (a) 0.495 (b) 4.95 (c) 49.5 (d) 0.0495
  37. 37.8.7 × 4.4 — where does the decimal point go? (a) 0.3828 (b) 3.828 (c) 38.28 (d) 382.8
  38. 38.5.9 × 0.6 — where does the decimal point go? (a) 0.354 (b) 3.54 (c) 0.0354 (d) 35.4
  39. 39.0.69 × 3.9 — where does the decimal point go? (a) 2.691 (b) 26.91 (c) 0.2691 (d) 0.02691
  40. 40.0.27 × 2.3 — where does the decimal point go? (a) 0.621 (b) 0.00621 (c) 0.0621 (d) 6.21

Answer key

  1. 3.108
  2. 39.01
  3. 0.183
  4. 2.196
  5. 13.02
  6. 65.8
  7. 0.208
  8. 25.2
  9. 0.66
  10. 25.2
  11. 0.255
  12. 1.075
  13. 23.2
  14. 2.34
  15. 32.25
  16. 1.02
  17. 19.24
  18. 0.174
  19. 25.2
  20. 9.6
  21. 10.92
  22. 8.55
  23. 12.65
  24. 2.55
  25. 0.931
  26. 4.08
  27. 59.2
  28. 3.52
  29. 1.02
  30. 0.162
  31. 13.23
  32. 55.8
  33. 0.066
  34. 246.4
  35. 6.25
  36. 4.95
  37. 38.28
  38. 3.54
  39. 2.691
  40. 0.621

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