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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 532 · 40 questions
TalentJR

The fast method (Double up): × 4: double, then double again. × 8: double three times. To double a big number, double the tens and the ones separately and add: double 37 = 60 + 14 = 74.

NameDateTime takenScore ___ / 40
  1. 1.144 × 4 =
  2. 2.114 × 4 =
  3. 3.28 × 8 =
  4. 4.18 × 8 =
  5. 5.21 × 8 =
  6. 6.15 × 4 =
  7. 7.25 × 8 =
  8. 8.120 × 4 =
  9. 9.13 × 4 =
  10. 10.23 × 4 =
  11. 11.94 × 4 =
  12. 12.64 × 8 =
  13. 13.114 × 4 =
  14. 14.40 × 8 =
  15. 15.59 × 8 =
  16. 16.22 × 8 =
  17. 17.30 × 4 =
  18. 18.47 × 8 =
  19. 19.132 × 4 =
  20. 20.82 × 4 =
  21. 21.125 × 4 =
  22. 22.123 × 4 =
  23. 23.83 × 4 =
  24. 24.108 × 4 =
  25. 25.43 × 8 =
  26. 26.14 × 4 =
  27. 27.14 × 4 =
  28. 28.65 × 4 =
  29. 29.62 × 8 =
  30. 30.123 × 4 =
  31. 31.19 × 8 =
  32. 32.25 × 8 =
  33. 33.123 × 4 =
  34. 34.28 × 4 =
  35. 35.72 × 8 =
  36. 36.79 × 4 =
  37. 37.24 × 8 =
  38. 38.51 × 8 =
  39. 39.69 × 8 =
  40. 40.18 × 4 =

Answer key

  1. 576
  2. 456
  3. 224
  4. 144
  5. 168
  6. 60
  7. 200
  8. 480
  9. 52
  10. 92
  11. 376
  12. 512
  13. 456
  14. 320
  15. 472
  16. 176
  17. 120
  18. 376
  19. 528
  20. 328
  21. 500
  22. 492
  23. 332
  24. 432
  25. 344
  26. 56
  27. 56
  28. 260
  29. 496
  30. 492
  31. 152
  32. 200
  33. 492
  34. 112
  35. 576
  36. 316
  37. 192
  38. 408
  39. 552
  40. 72

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