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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 855 · 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. 1.110 × 4 =
  2. 2.51 × 8 =
  3. 3.12 × 8 =
  4. 4.66 × 8 =
  5. 5.47 × 8 =
  6. 6.157 × 4 =
  7. 7.47 × 8 =
  8. 8.64 × 8 =
  9. 9.55 × 8 =
  10. 10.65 × 4 =
  11. 11.37 × 8 =
  12. 12.12 × 8 =
  13. 13.23 × 8 =
  14. 14.68 × 8 =
  15. 15.63 × 8 =
  16. 16.27 × 8 =
  17. 17.62 × 8 =
  18. 18.65 × 8 =
  19. 19.51 × 8 =
  20. 20.27 × 8 =
  21. 21.20 × 8 =
  22. 22.22 × 4 =
  23. 23.56 × 4 =
  24. 24.123 × 4 =
  25. 25.52 × 8 =
  26. 26.54 × 4 =
  27. 27.43 × 8 =
  28. 28.49 × 8 =
  29. 29.144 × 4 =
  30. 30.43 × 8 =
  31. 31.70 × 4 =
  32. 32.13 × 4 =
  33. 33.21 × 8 =
  34. 34.106 × 4 =
  35. 35.139 × 4 =
  36. 36.16 × 8 =
  37. 37.42 × 4 =
  38. 38.44 × 4 =
  39. 39.47 × 4 =
  40. 40.21 × 8 =

Answer key

  1. 440
  2. 408
  3. 96
  4. 528
  5. 376
  6. 628
  7. 376
  8. 512
  9. 440
  10. 260
  11. 296
  12. 96
  13. 184
  14. 544
  15. 504
  16. 216
  17. 496
  18. 520
  19. 408
  20. 216
  21. 160
  22. 88
  23. 224
  24. 492
  25. 416
  26. 216
  27. 344
  28. 392
  29. 576
  30. 344
  31. 280
  32. 52
  33. 168
  34. 424
  35. 556
  36. 128
  37. 168
  38. 176
  39. 188
  40. 168

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