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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 288 · 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. 1.37 × 8 =
  2. 2.29 × 8 =
  3. 3.35 × 4 =
  4. 4.156 × 4 =
  5. 5.18 × 8 =
  6. 6.62 × 4 =
  7. 7.147 × 4 =
  8. 8.159 × 4 =
  9. 9.38 × 4 =
  10. 10.154 × 4 =
  11. 11.122 × 4 =
  12. 12.50 × 8 =
  13. 13.45 × 8 =
  14. 14.40 × 8 =
  15. 15.135 × 4 =
  16. 16.41 × 8 =
  17. 17.57 × 8 =
  18. 18.147 × 4 =
  19. 19.73 × 8 =
  20. 20.47 × 8 =
  21. 21.45 × 8 =
  22. 22.40 × 4 =
  23. 23.157 × 4 =
  24. 24.20 × 8 =
  25. 25.131 × 4 =
  26. 26.21 × 4 =
  27. 27.56 × 8 =
  28. 28.51 × 8 =
  29. 29.38 × 8 =
  30. 30.61 × 8 =
  31. 31.68 × 4 =
  32. 32.26 × 8 =
  33. 33.130 × 4 =
  34. 34.30 × 8 =
  35. 35.25 × 8 =
  36. 36.24 × 8 =
  37. 37.12 × 8 =
  38. 38.79 × 4 =
  39. 39.37 × 4 =
  40. 40.102 × 4 =

Answer key

  1. 296
  2. 232
  3. 140
  4. 624
  5. 144
  6. 248
  7. 588
  8. 636
  9. 152
  10. 616
  11. 488
  12. 400
  13. 360
  14. 320
  15. 540
  16. 328
  17. 456
  18. 588
  19. 584
  20. 376
  21. 360
  22. 160
  23. 628
  24. 160
  25. 524
  26. 84
  27. 448
  28. 408
  29. 304
  30. 488
  31. 272
  32. 208
  33. 520
  34. 240
  35. 200
  36. 192
  37. 96
  38. 316
  39. 148
  40. 408

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