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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 430 · 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. 1.0.76 × 0.2 — where does the decimal point go? (a) 0.00152 (b) 1.52 (c) 0.0152 (d) 0.152
  2. 2.0.52 × 0.6 — where does the decimal point go? (a) 0.312 (b) 0.0312 (c) 0.00312 (d) 3.12
  3. 3.0.65 × 7 — where does the decimal point go? (a) 45.5 (b) 4.55 (c) 0.455 (d) 0.0455
  4. 4.5.9 × 4.5 — where does the decimal point go? (a) 265.5 (b) 2.655 (c) 26.55 (d) 0.2655
  5. 5.0.87 × 3 — where does the decimal point go? (a) 0.261 (b) 2.61 (c) 0.0261 (d) 26.1
  6. 6.0.23 × 16 — where does the decimal point go? (a) 0.0368 (b) 3.68 (c) 36.8 (d) 0.368
  7. 7.8.8 × 47 — where does the decimal point go? (a) 41.36 (b) 413.6 (c) 4.136 (d) 4136
  8. 8.6.3 × 2.2 — where does the decimal point go? (a) 0.1386 (b) 138.6 (c) 1.386 (d) 13.86
  9. 9.0.84 × 6 — where does the decimal point go? (a) 0.504 (b) 0.0504 (c) 50.4 (d) 5.04
  10. 10.0.97 × 3 — where does the decimal point go? (a) 2.91 (b) 0.0291 (c) 29.1 (d) 0.291
  11. 11.9.4 × 7 — where does the decimal point go? (a) 6.58 (b) 65.8 (c) 658 (d) 0.658
  12. 12.9.6 × 7 — where does the decimal point go? (a) 6.72 (b) 672 (c) 0.672 (d) 67.2
  13. 13.7.2 × 3.7 — where does the decimal point go? (a) 26.64 (b) 266.4 (c) 0.2664 (d) 2.664
  14. 14.4.4 × 11 — where does the decimal point go? (a) 0.484 (b) 48.4 (c) 4.84 (d) 484
  15. 15.0.26 × 2.6 — where does the decimal point go? (a) 0.676 (b) 6.76 (c) 0.00676 (d) 0.0676
  16. 16.0.93 × 0.7 — where does the decimal point go? (a) 0.0651 (b) 0.00651 (c) 0.651 (d) 6.51
  17. 17.0.58 × 3.9 — where does the decimal point go? (a) 0.02262 (b) 22.62 (c) 2.262 (d) 0.2262
  18. 18.7.9 × 9 — where does the decimal point go? (a) 71.1 (b) 0.711 (c) 711 (d) 7.11
  19. 19.0.43 × 2.5 — where does the decimal point go? (a) 0.01075 (b) 0.1075 (c) 10.75 (d) 1.075
  20. 20.0.32 × 42 — where does the decimal point go? (a) 1.344 (b) 0.1344 (c) 13.44 (d) 134.4
  21. 21.0.94 × 28 — where does the decimal point go? (a) 26.32 (b) 263.2 (c) 0.2632 (d) 2.632
  22. 22.0.29 × 5 — where does the decimal point go? (a) 0.145 (b) 1.45 (c) 0.0145 (d) 14.5
  23. 23.7.9 × 4 — where does the decimal point go? (a) 316 (b) 0.316 (c) 3.16 (d) 31.6
  24. 24.2.3 × 0.7 — where does the decimal point go? (a) 1.61 (b) 0.161 (c) 0.0161 (d) 16.1
  25. 25.0.74 × 0.6 — where does the decimal point go? (a) 0.00444 (b) 0.444 (c) 4.44 (d) 0.0444
  26. 26.2.8 × 3.9 — where does the decimal point go? (a) 1.092 (b) 10.92 (c) 0.1092 (d) 109.2
  27. 27.4.1 × 0.5 — where does the decimal point go? (a) 0.0205 (b) 2.05 (c) 0.205 (d) 20.5
  28. 28.4.8 × 29 — where does the decimal point go? (a) 13.92 (b) 1.392 (c) 1392 (d) 139.2
  29. 29.0.18 × 0.7 — where does the decimal point go? (a) 0.00126 (b) 1.26 (c) 0.0126 (d) 0.126
  30. 30.8.3 × 2 — where does the decimal point go? (a) 1.66 (b) 166 (c) 0.166 (d) 16.6
  31. 31.5.4 × 2.4 — where does the decimal point go? (a) 12.96 (b) 129.6 (c) 1.296 (d) 0.1296
  32. 32.0.39 × 2.2 — where does the decimal point go? (a) 0.0858 (b) 0.858 (c) 0.00858 (d) 8.58
  33. 33.0.88 × 2.8 — where does the decimal point go? (a) 0.02464 (b) 0.2464 (c) 24.64 (d) 2.464
  34. 34.0.74 × 27 — where does the decimal point go? (a) 199.8 (b) 19.98 (c) 1.998 (d) 0.1998
  35. 35.5.5 × 0.3 — where does the decimal point go? (a) 1.65 (b) 16.5 (c) 0.165 (d) 0.0165
  36. 36.0.28 × 2 — where does the decimal point go? (a) 0.56 (b) 0.0056 (c) 0.056 (d) 5.6
  37. 37.0.31 × 36 — where does the decimal point go? (a) 1.116 (b) 111.6 (c) 11.16 (d) 0.1116
  38. 38.7.2 × 0.9 — where does the decimal point go? (a) 0.0648 (b) 0.648 (c) 64.8 (d) 6.48
  39. 39.5.2 × 8 — where does the decimal point go? (a) 41.6 (b) 0.416 (c) 4.16 (d) 416
  40. 40.0.13 × 2 — where does the decimal point go? (a) 0.026 (b) 0.26 (c) 2.6 (d) 0.0026

Answer key

  1. 0.152
  2. 0.312
  3. 4.55
  4. 26.55
  5. 2.61
  6. 3.68
  7. 413.6
  8. 13.86
  9. 5.04
  10. 2.91
  11. 65.8
  12. 67.2
  13. 26.64
  14. 48.4
  15. 0.676
  16. 0.651
  17. 2.262
  18. 71.1
  19. 1.075
  20. 13.44
  21. 26.32
  22. 1.45
  23. 31.6
  24. 1.61
  25. 0.444
  26. 10.92
  27. 2.05
  28. 139.2
  29. 0.126
  30. 16.6
  31. 12.96
  32. 0.858
  33. 2.464
  34. 19.98
  35. 1.65
  36. 0.56
  37. 11.16
  38. 6.48
  39. 41.6
  40. 0.26

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