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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 156 · 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. 1.86 × 4 =
  2. 2.95 × 4 =
  3. 3.119 × 4 =
  4. 4.74 × 8 =
  5. 5.42 × 8 =
  6. 6.115 × 4 =
  7. 7.96 × 4 =
  8. 8.66 × 8 =
  9. 9.112 × 4 =
  10. 10.29 × 4 =
  11. 11.13 × 4 =
  12. 12.132 × 4 =
  13. 13.38 × 4 =
  14. 14.146 × 4 =
  15. 15.16 × 4 =
  16. 16.72 × 8 =
  17. 17.21 × 8 =
  18. 18.52 × 8 =
  19. 19.128 × 4 =
  20. 20.68 × 8 =
  21. 21.144 × 4 =
  22. 22.36 × 8 =
  23. 23.38 × 8 =
  24. 24.40 × 4 =
  25. 25.37 × 4 =
  26. 26.22 × 4 =
  27. 27.13 × 8 =
  28. 28.145 × 4 =
  29. 29.126 × 4 =
  30. 30.37 × 8 =
  31. 31.154 × 4 =
  32. 32.100 × 4 =
  33. 33.96 × 4 =
  34. 34.29 × 4 =
  35. 35.45 × 8 =
  36. 36.16 × 8 =
  37. 37.29 × 8 =
  38. 38.96 × 4 =
  39. 39.80 × 4 =
  40. 40.61 × 8 =

Answer key

  1. 344
  2. 380
  3. 476
  4. 592
  5. 336
  6. 460
  7. 384
  8. 528
  9. 448
  10. 116
  11. 52
  12. 528
  13. 152
  14. 584
  15. 64
  16. 576
  17. 168
  18. 416
  19. 512
  20. 544
  21. 576
  22. 288
  23. 304
  24. 160
  25. 148
  26. 88
  27. 104
  28. 580
  29. 504
  30. 296
  31. 616
  32. 400
  33. 384
  34. 116
  35. 360
  36. 128
  37. 232
  38. 384
  39. 320
  40. 488

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