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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 508 · 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. 1.47 × 8 =
  2. 2.69 × 8 =
  3. 3.108 × 4 =
  4. 4.133 × 4 =
  5. 5.26 × 4 =
  6. 6.37 × 8 =
  7. 7.152 × 4 =
  8. 8.86 × 4 =
  9. 9.99 × 4 =
  10. 10.64 × 8 =
  11. 11.116 × 4 =
  12. 12.52 × 4 =
  13. 13.25 × 4 =
  14. 14.65 × 4 =
  15. 15.13 × 4 =
  16. 16.46 × 4 =
  17. 17.61 × 8 =
  18. 18.112 × 4 =
  19. 19.29 × 4 =
  20. 20.61 × 8 =
  21. 21.44 × 8 =
  22. 22.139 × 4 =
  23. 23.71 × 4 =
  24. 24.100 × 4 =
  25. 25.101 × 4 =
  26. 26.53 × 8 =
  27. 27.61 × 4 =
  28. 28.16 × 8 =
  29. 29.136 × 4 =
  30. 30.27 × 8 =
  31. 31.130 × 4 =
  32. 32.33 × 8 =
  33. 33.124 × 4 =
  34. 34.43 × 8 =
  35. 35.20 × 4 =
  36. 36.48 × 8 =
  37. 37.66 × 8 =
  38. 38.21 × 8 =
  39. 39.56 × 4 =
  40. 40.113 × 4 =

Answer key

  1. 376
  2. 552
  3. 432
  4. 532
  5. 104
  6. 296
  7. 608
  8. 344
  9. 396
  10. 512
  11. 464
  12. 208
  13. 100
  14. 260
  15. 52
  16. 184
  17. 488
  18. 448
  19. 116
  20. 488
  21. 352
  22. 556
  23. 284
  24. 400
  25. 404
  26. 424
  27. 244
  28. 128
  29. 544
  30. 216
  31. 520
  32. 264
  33. 496
  34. 344
  35. 80
  36. 384
  37. 528
  38. 168
  39. 224
  40. 452

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