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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 789 · 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. 1.28 × 8 =
  2. 2.102 × 4 =
  3. 3.22 × 8 =
  4. 4.40 × 8 =
  5. 5.117 × 4 =
  6. 6.34 × 8 =
  7. 7.84 × 4 =
  8. 8.69 × 8 =
  9. 9.53 × 8 =
  10. 10.124 × 4 =
  11. 11.13 × 4 =
  12. 12.26 × 8 =
  13. 13.41 × 4 =
  14. 14.69 × 8 =
  15. 15.63 × 4 =
  16. 16.19 × 8 =
  17. 17.41 × 8 =
  18. 18.150 × 4 =
  19. 19.16 × 8 =
  20. 20.68 × 8 =
  21. 21.46 × 8 =
  22. 22.132 × 4 =
  23. 23.89 × 4 =
  24. 24.30 × 4 =
  25. 25.91 × 4 =
  26. 26.143 × 4 =
  27. 27.41 × 8 =
  28. 28.55 × 8 =
  29. 29.58 × 8 =
  30. 30.21 × 8 =
  31. 31.57 × 8 =
  32. 32.27 × 8 =
  33. 33.63 × 8 =
  34. 34.129 × 4 =
  35. 35.109 × 4 =
  36. 36.64 × 4 =
  37. 37.74 × 8 =
  38. 38.49 × 8 =
  39. 39.43 × 8 =
  40. 40.18 × 4 =

Answer key

  1. 224
  2. 408
  3. 176
  4. 320
  5. 468
  6. 272
  7. 336
  8. 552
  9. 424
  10. 496
  11. 52
  12. 208
  13. 164
  14. 552
  15. 252
  16. 152
  17. 328
  18. 600
  19. 128
  20. 544
  21. 368
  22. 528
  23. 356
  24. 120
  25. 364
  26. 572
  27. 328
  28. 440
  29. 464
  30. 168
  31. 456
  32. 216
  33. 504
  34. 516
  35. 436
  36. 256
  37. 592
  38. 392
  39. 344
  40. 72

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