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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 548 · 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. 1.15 × 8 =
  2. 2.21 × 8 =
  3. 3.19 × 8 =
  4. 4.92 × 4 =
  5. 5.37 × 8 =
  6. 6.47 × 8 =
  7. 7.31 × 8 =
  8. 8.113 × 4 =
  9. 9.28 × 4 =
  10. 10.97 × 4 =
  11. 11.103 × 4 =
  12. 12.79 × 4 =
  13. 13.28 × 8 =
  14. 14.126 × 4 =
  15. 15.139 × 4 =
  16. 16.67 × 4 =
  17. 17.122 × 4 =
  18. 18.57 × 8 =
  19. 19.72 × 8 =
  20. 20.50 × 4 =
  21. 21.39 × 8 =
  22. 22.77 × 4 =
  23. 23.48 × 8 =
  24. 24.33 × 8 =
  25. 25.20 × 8 =
  26. 26.40 × 8 =
  27. 27.135 × 4 =
  28. 28.128 × 4 =
  29. 29.150 × 4 =
  30. 30.21 × 8 =
  31. 31.69 × 8 =
  32. 32.26 × 8 =
  33. 33.158 × 4 =
  34. 34.28 × 8 =
  35. 35.56 × 8 =
  36. 36.78 × 4 =
  37. 37.97 × 4 =
  38. 38.128 × 4 =
  39. 39.40 × 8 =
  40. 40.120 × 4 =

Answer key

  1. 120
  2. 168
  3. 152
  4. 368
  5. 296
  6. 376
  7. 248
  8. 452
  9. 112
  10. 388
  11. 412
  12. 316
  13. 224
  14. 504
  15. 556
  16. 268
  17. 488
  18. 456
  19. 576
  20. 200
  21. 312
  22. 308
  23. 384
  24. 264
  25. 160
  26. 320
  27. 540
  28. 512
  29. 600
  30. 168
  31. 552
  32. 208
  33. 632
  34. 224
  35. 448
  36. 312
  37. 388
  38. 512
  39. 320
  40. 480

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