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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 249 · 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. 1.5.1 × 2 — where does the decimal point go? (a) 10.2 (b) 102 (c) 1.02 (d) 0.102
  2. 2.0.42 × 0.3 — where does the decimal point go? (a) 0.126 (b) 0.0126 (c) 1.26 (d) 0.00126
  3. 3.0.29 × 1.5 — where does the decimal point go? (a) 0.0435 (b) 4.35 (c) 0.435 (d) 0.00435
  4. 4.2.9 × 4.8 — where does the decimal point go? (a) 1.392 (b) 0.1392 (c) 13.92 (d) 139.2
  5. 5.0.14 × 3 — where does the decimal point go? (a) 0.0042 (b) 0.042 (c) 4.2 (d) 0.42
  6. 6.7.3 × 2.1 — where does the decimal point go? (a) 1.533 (b) 153.3 (c) 0.1533 (d) 15.33
  7. 7.8.5 × 1.9 — where does the decimal point go? (a) 16.15 (b) 0.1615 (c) 161.5 (d) 1.615
  8. 8.0.24 × 3.1 — where does the decimal point go? (a) 0.0744 (b) 0.744 (c) 0.00744 (d) 7.44
  9. 9.0.67 × 15 — where does the decimal point go? (a) 10.05 (b) 1.005 (c) 0.1005 (d) 100.5
  10. 10.5.1 × 0.7 — where does the decimal point go? (a) 0.0357 (b) 35.7 (c) 3.57 (d) 0.357
  11. 11.5.5 × 4.1 — where does the decimal point go? (a) 2.255 (b) 0.2255 (c) 22.55 (d) 225.5
  12. 12.0.27 × 0.7 — where does the decimal point go? (a) 0.189 (b) 0.0189 (c) 0.00189 (d) 1.89
  13. 13.0.52 × 3 — where does the decimal point go? (a) 15.6 (b) 0.156 (c) 0.0156 (d) 1.56
  14. 14.0.44 × 8 — where does the decimal point go? (a) 3.52 (b) 0.352 (c) 35.2 (d) 0.0352
  15. 15.0.48 × 3 — where does the decimal point go? (a) 0.0144 (b) 1.44 (c) 0.144 (d) 14.4
  16. 16.1.4 × 0.2 — where does the decimal point go? (a) 0.0028 (b) 0.028 (c) 2.8 (d) 0.28
  17. 17.3.8 × 0.4 — where does the decimal point go? (a) 1.52 (b) 0.152 (c) 15.2 (d) 0.0152
  18. 18.0.64 × 0.4 — where does the decimal point go? (a) 2.56 (b) 0.0256 (c) 0.256 (d) 0.00256
  19. 19.5.8 × 0.6 — where does the decimal point go? (a) 3.48 (b) 34.8 (c) 0.0348 (d) 0.348
  20. 20.0.76 × 3.2 — where does the decimal point go? (a) 0.2432 (b) 0.02432 (c) 24.32 (d) 2.432
  21. 21.6.9 × 22 — where does the decimal point go? (a) 15.18 (b) 1.518 (c) 1518 (d) 151.8
  22. 22.0.93 × 1.9 — where does the decimal point go? (a) 1.767 (b) 17.67 (c) 0.1767 (d) 0.01767
  23. 23.5.8 × 3 — where does the decimal point go? (a) 17.4 (b) 1.74 (c) 174 (d) 0.174
  24. 24.6.1 × 4 — where does the decimal point go? (a) 24.4 (b) 0.244 (c) 2.44 (d) 244
  25. 25.1.6 × 1.2 — where does the decimal point go? (a) 0.192 (b) 19.2 (c) 1.92 (d) 0.0192
  26. 26.0.87 × 2 — where does the decimal point go? (a) 1.74 (b) 0.174 (c) 17.4 (d) 0.0174
  27. 27.0.31 × 6 — where does the decimal point go? (a) 1.86 (b) 18.6 (c) 0.186 (d) 0.0186
  28. 28.0.15 × 23 — where does the decimal point go? (a) 3.45 (b) 0.0345 (c) 0.345 (d) 34.5
  29. 29.0.74 × 0.3 — where does the decimal point go? (a) 0.0222 (b) 0.00222 (c) 0.222 (d) 2.22
  30. 30.3.4 × 11 — where does the decimal point go? (a) 37.4 (b) 3.74 (c) 0.374 (d) 374
  31. 31.3.9 × 28 — where does the decimal point go? (a) 1.092 (b) 109.2 (c) 1092 (d) 10.92
  32. 32.0.96 × 3.6 — where does the decimal point go? (a) 0.03456 (b) 3.456 (c) 0.3456 (d) 34.56
  33. 33.0.38 × 4 — where does the decimal point go? (a) 0.0152 (b) 0.152 (c) 15.2 (d) 1.52
  34. 34.0.22 × 9 — where does the decimal point go? (a) 0.198 (b) 1.98 (c) 19.8 (d) 0.0198
  35. 35.7.4 × 7 — where does the decimal point go? (a) 51.8 (b) 0.518 (c) 518 (d) 5.18
  36. 36.8.6 × 36 — where does the decimal point go? (a) 3.096 (b) 30.96 (c) 3096 (d) 309.6
  37. 37.0.39 × 1.7 — where does the decimal point go? (a) 0.00663 (b) 6.63 (c) 0.0663 (d) 0.663
  38. 38.0.99 × 0.4 — where does the decimal point go? (a) 3.96 (b) 0.396 (c) 0.00396 (d) 0.0396
  39. 39.0.92 × 3.6 — where does the decimal point go? (a) 0.03312 (b) 3.312 (c) 33.12 (d) 0.3312
  40. 40.0.73 × 0.2 — where does the decimal point go? (a) 0.146 (b) 1.46 (c) 0.0146 (d) 0.00146

Answer key

  1. 10.2
  2. 0.126
  3. 0.435
  4. 13.92
  5. 0.42
  6. 15.33
  7. 16.15
  8. 0.744
  9. 10.05
  10. 3.57
  11. 22.55
  12. 0.189
  13. 1.56
  14. 3.52
  15. 1.44
  16. 0.28
  17. 1.52
  18. 0.256
  19. 3.48
  20. 2.432
  21. 151.8
  22. 1.767
  23. 17.4
  24. 24.4
  25. 1.92
  26. 1.74
  27. 1.86
  28. 3.45
  29. 0.222
  30. 37.4
  31. 109.2
  32. 3.456
  33. 1.52
  34. 1.98
  35. 51.8
  36. 309.6
  37. 0.663
  38. 0.396
  39. 3.312
  40. 0.146

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