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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 487 · 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. 1.158 × 4 =
  2. 2.23 × 8 =
  3. 3.149 × 4 =
  4. 4.66 × 8 =
  5. 5.112 × 4 =
  6. 6.40 × 8 =
  7. 7.58 × 8 =
  8. 8.37 × 8 =
  9. 9.28 × 4 =
  10. 10.17 × 4 =
  11. 11.74 × 8 =
  12. 12.104 × 4 =
  13. 13.76 × 4 =
  14. 14.154 × 4 =
  15. 15.49 × 8 =
  16. 16.60 × 8 =
  17. 17.64 × 8 =
  18. 18.24 × 8 =
  19. 19.18 × 8 =
  20. 20.51 × 4 =
  21. 21.61 × 4 =
  22. 22.19 × 4 =
  23. 23.88 × 4 =
  24. 24.18 × 8 =
  25. 25.32 × 8 =
  26. 26.21 × 8 =
  27. 27.16 × 8 =
  28. 28.66 × 8 =
  29. 29.142 × 4 =
  30. 30.58 × 8 =
  31. 31.133 × 4 =
  32. 32.66 × 8 =
  33. 33.51 × 8 =
  34. 34.41 × 4 =
  35. 35.13 × 8 =
  36. 36.71 × 8 =
  37. 37.48 × 4 =
  38. 38.69 × 4 =
  39. 39.34 × 8 =
  40. 40.40 × 8 =

Answer key

  1. 632
  2. 184
  3. 596
  4. 528
  5. 448
  6. 320
  7. 464
  8. 296
  9. 112
  10. 68
  11. 592
  12. 416
  13. 304
  14. 616
  15. 392
  16. 480
  17. 512
  18. 192
  19. 144
  20. 204
  21. 244
  22. 76
  23. 352
  24. 144
  25. 256
  26. 168
  27. 128
  28. 528
  29. 568
  30. 464
  31. 532
  32. 528
  33. 408
  34. 164
  35. 104
  36. 568
  37. 192
  38. 276
  39. 272
  40. 320

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