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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 893 · 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. 1.0.67 × 6 — where does the decimal point go? (a) 0.0402 (b) 4.02 (c) 0.402 (d) 40.2
  2. 2.0.49 × 3.2 — where does the decimal point go? (a) 0.1568 (b) 1.568 (c) 0.01568 (d) 15.68
  3. 3.0.14 × 3.4 — where does the decimal point go? (a) 4.76 (b) 0.0476 (c) 0.476 (d) 0.00476
  4. 4.3.1 × 6 — where does the decimal point go? (a) 18.6 (b) 186 (c) 1.86 (d) 0.186
  5. 5.1.2 × 0.7 — where does the decimal point go? (a) 0.0084 (b) 0.84 (c) 8.4 (d) 0.084
  6. 6.0.22 × 3.2 — where does the decimal point go? (a) 0.704 (b) 0.0704 (c) 0.00704 (d) 7.04
  7. 7.0.27 × 7 — where does the decimal point go? (a) 1.89 (b) 0.189 (c) 18.9 (d) 0.0189
  8. 8.0.28 × 22 — where does the decimal point go? (a) 6.16 (b) 0.0616 (c) 61.6 (d) 0.616
  9. 9.2.9 × 29 — where does the decimal point go? (a) 84.1 (b) 8.41 (c) 0.841 (d) 841
  10. 10.9.1 × 37 — where does the decimal point go? (a) 33.67 (b) 3.367 (c) 336.7 (d) 3367
  11. 11.9.4 × 2.6 — where does the decimal point go? (a) 24.44 (b) 2.444 (c) 244.4 (d) 0.2444
  12. 12.7.9 × 4 — where does the decimal point go? (a) 31.6 (b) 0.316 (c) 316 (d) 3.16
  13. 13.9.8 × 3.6 — where does the decimal point go? (a) 3.528 (b) 0.3528 (c) 35.28 (d) 352.8
  14. 14.0.76 × 0.3 — where does the decimal point go? (a) 0.228 (b) 2.28 (c) 0.00228 (d) 0.0228
  15. 15.0.64 × 0.8 — where does the decimal point go? (a) 0.00512 (b) 0.0512 (c) 5.12 (d) 0.512
  16. 16.2.1 × 0.4 — where does the decimal point go? (a) 0.0084 (b) 8.4 (c) 0.84 (d) 0.084
  17. 17.7.2 × 2 — where does the decimal point go? (a) 14.4 (b) 0.144 (c) 144 (d) 1.44
  18. 18.0.71 × 0.2 — where does the decimal point go? (a) 0.0142 (b) 0.00142 (c) 0.142 (d) 1.42
  19. 19.3.4 × 0.4 — where does the decimal point go? (a) 13.6 (b) 0.136 (c) 0.0136 (d) 1.36
  20. 20.0.33 × 2.2 — where does the decimal point go? (a) 7.26 (b) 0.726 (c) 0.00726 (d) 0.0726
  21. 21.8.9 × 9 — where does the decimal point go? (a) 0.801 (b) 801 (c) 8.01 (d) 80.1
  22. 22.3.7 × 36 — where does the decimal point go? (a) 133.2 (b) 1.332 (c) 1332 (d) 13.32
  23. 23.6.7 × 17 — where does the decimal point go? (a) 11.39 (b) 113.9 (c) 1139 (d) 1.139
  24. 24.0.89 × 8 — where does the decimal point go? (a) 0.0712 (b) 71.2 (c) 0.712 (d) 7.12
  25. 25.0.34 × 7 — where does the decimal point go? (a) 0.0238 (b) 0.238 (c) 23.8 (d) 2.38
  26. 26.5.1 × 3.3 — where does the decimal point go? (a) 168.3 (b) 16.83 (c) 0.1683 (d) 1.683
  27. 27.0.32 × 39 — where does the decimal point go? (a) 0.1248 (b) 1.248 (c) 124.8 (d) 12.48
  28. 28.8.6 × 0.3 — where does the decimal point go? (a) 0.258 (b) 2.58 (c) 0.0258 (d) 25.8
  29. 29.9.7 × 17 — where does the decimal point go? (a) 16.49 (b) 164.9 (c) 1.649 (d) 1649
  30. 30.9.8 × 4.2 — where does the decimal point go? (a) 0.4116 (b) 41.16 (c) 4.116 (d) 411.6
  31. 31.5.3 × 2.7 — where does the decimal point go? (a) 143.1 (b) 14.31 (c) 0.1431 (d) 1.431
  32. 32.0.76 × 0.7 — where does the decimal point go? (a) 0.00532 (b) 0.0532 (c) 5.32 (d) 0.532
  33. 33.0.82 × 4.4 — where does the decimal point go? (a) 3.608 (b) 36.08 (c) 0.3608 (d) 0.03608
  34. 34.0.22 × 4.9 — where does the decimal point go? (a) 0.01078 (b) 10.78 (c) 1.078 (d) 0.1078
  35. 35.0.67 × 0.3 — where does the decimal point go? (a) 0.00201 (b) 2.01 (c) 0.0201 (d) 0.201
  36. 36.8.8 × 1.7 — where does the decimal point go? (a) 1.496 (b) 14.96 (c) 149.6 (d) 0.1496
  37. 37.8.8 × 7 — where does the decimal point go? (a) 6.16 (b) 616 (c) 0.616 (d) 61.6
  38. 38.0.19 × 8 — where does the decimal point go? (a) 1.52 (b) 15.2 (c) 0.0152 (d) 0.152
  39. 39.0.26 × 2 — where does the decimal point go? (a) 0.0052 (b) 5.2 (c) 0.52 (d) 0.052
  40. 40.4.3 × 7 — where does the decimal point go? (a) 0.301 (b) 30.1 (c) 3.01 (d) 301

Answer key

  1. 4.02
  2. 1.568
  3. 0.476
  4. 18.6
  5. 0.84
  6. 0.704
  7. 1.89
  8. 6.16
  9. 84.1
  10. 336.7
  11. 24.44
  12. 31.6
  13. 35.28
  14. 0.228
  15. 0.512
  16. 0.84
  17. 14.4
  18. 0.142
  19. 1.36
  20. 0.726
  21. 80.1
  22. 133.2
  23. 113.9
  24. 7.12
  25. 2.38
  26. 16.83
  27. 12.48
  28. 2.58
  29. 164.9
  30. 41.16
  31. 14.31
  32. 0.532
  33. 3.608
  34. 1.078
  35. 0.201
  36. 14.96
  37. 61.6
  38. 1.52
  39. 0.52
  40. 30.1

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