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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 827 · 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. 1.36 × 4 =
  2. 2.100 × 4 =
  3. 3.154 × 4 =
  4. 4.143 × 4 =
  5. 5.51 × 8 =
  6. 6.101 × 4 =
  7. 7.84 × 4 =
  8. 8.160 × 4 =
  9. 9.39 × 4 =
  10. 10.36 × 8 =
  11. 11.52 × 4 =
  12. 12.84 × 4 =
  13. 13.77 × 4 =
  14. 14.51 × 4 =
  15. 15.31 × 4 =
  16. 16.122 × 4 =
  17. 17.17 × 8 =
  18. 18.139 × 4 =
  19. 19.149 × 4 =
  20. 20.117 × 4 =
  21. 21.32 × 8 =
  22. 22.25 × 8 =
  23. 23.57 × 8 =
  24. 24.33 × 8 =
  25. 25.19 × 4 =
  26. 26.72 × 8 =
  27. 27.69 × 8 =
  28. 28.14 × 8 =
  29. 29.75 × 4 =
  30. 30.46 × 4 =
  31. 31.29 × 4 =
  32. 32.61 × 8 =
  33. 33.116 × 4 =
  34. 34.13 × 4 =
  35. 35.131 × 4 =
  36. 36.15 × 8 =
  37. 37.130 × 4 =
  38. 38.12 × 8 =
  39. 39.28 × 4 =
  40. 40.119 × 4 =

Answer key

  1. 144
  2. 400
  3. 616
  4. 572
  5. 408
  6. 404
  7. 336
  8. 640
  9. 156
  10. 288
  11. 208
  12. 336
  13. 308
  14. 204
  15. 124
  16. 488
  17. 136
  18. 556
  19. 596
  20. 468
  21. 256
  22. 200
  23. 456
  24. 264
  25. 76
  26. 576
  27. 552
  28. 112
  29. 300
  30. 184
  31. 116
  32. 488
  33. 464
  34. 52
  35. 524
  36. 120
  37. 520
  38. 96
  39. 112
  40. 476

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