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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 577 · 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. 1.24 × 8 =
  2. 2.49 × 8 =
  3. 3.37 × 4 =
  4. 4.66 × 8 =
  5. 5.128 × 4 =
  6. 6.112 × 4 =
  7. 7.38 × 8 =
  8. 8.56 × 8 =
  9. 9.42 × 4 =
  10. 10.16 × 8 =
  11. 11.91 × 4 =
  12. 12.142 × 4 =
  13. 13.141 × 4 =
  14. 14.100 × 4 =
  15. 15.41 × 8 =
  16. 16.160 × 4 =
  17. 17.63 × 4 =
  18. 18.63 × 4 =
  19. 19.18 × 8 =
  20. 20.39 × 4 =
  21. 21.128 × 4 =
  22. 22.97 × 4 =
  23. 23.71 × 8 =
  24. 24.62 × 8 =
  25. 25.14 × 8 =
  26. 26.53 × 4 =
  27. 27.107 × 4 =
  28. 28.20 × 8 =
  29. 29.65 × 4 =
  30. 30.140 × 4 =
  31. 31.49 × 8 =
  32. 32.15 × 8 =
  33. 33.62 × 8 =
  34. 34.158 × 4 =
  35. 35.73 × 8 =
  36. 36.114 × 4 =
  37. 37.69 × 8 =
  38. 38.73 × 8 =
  39. 39.143 × 4 =
  40. 40.75 × 8 =

Answer key

  1. 192
  2. 392
  3. 148
  4. 528
  5. 512
  6. 448
  7. 304
  8. 448
  9. 168
  10. 128
  11. 364
  12. 568
  13. 564
  14. 400
  15. 328
  16. 640
  17. 252
  18. 252
  19. 144
  20. 156
  21. 512
  22. 388
  23. 568
  24. 496
  25. 112
  26. 212
  27. 428
  28. 160
  29. 260
  30. 560
  31. 392
  32. 120
  33. 496
  34. 632
  35. 584
  36. 456
  37. 552
  38. 584
  39. 572
  40. 600

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