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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 143 · 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. 1.18 × 8 =
  2. 2.15 × 4 =
  3. 3.41 × 8 =
  4. 4.154 × 4 =
  5. 5.26 × 8 =
  6. 6.104 × 4 =
  7. 7.72 × 8 =
  8. 8.45 × 8 =
  9. 9.89 × 4 =
  10. 10.113 × 4 =
  11. 11.35 × 4 =
  12. 12.142 × 4 =
  13. 13.97 × 4 =
  14. 14.116 × 4 =
  15. 15.132 × 4 =
  16. 16.15 × 8 =
  17. 17.43 × 4 =
  18. 18.35 × 8 =
  19. 19.20 × 4 =
  20. 20.33 × 8 =
  21. 21.80 × 4 =
  22. 22.157 × 4 =
  23. 23.17 × 4 =
  24. 24.15 × 8 =
  25. 25.59 × 4 =
  26. 26.146 × 4 =
  27. 27.112 × 4 =
  28. 28.42 × 8 =
  29. 29.40 × 4 =
  30. 30.21 × 8 =
  31. 31.63 × 4 =
  32. 32.66 × 8 =
  33. 33.145 × 4 =
  34. 34.12 × 8 =
  35. 35.149 × 4 =
  36. 36.145 × 4 =
  37. 37.79 × 4 =
  38. 38.62 × 4 =
  39. 39.19 × 4 =
  40. 40.43 × 8 =

Answer key

  1. 144
  2. 60
  3. 328
  4. 616
  5. 208
  6. 416
  7. 576
  8. 360
  9. 356
  10. 452
  11. 140
  12. 568
  13. 388
  14. 464
  15. 528
  16. 120
  17. 172
  18. 280
  19. 80
  20. 264
  21. 320
  22. 628
  23. 68
  24. 120
  25. 236
  26. 584
  27. 448
  28. 336
  29. 160
  30. 168
  31. 252
  32. 528
  33. 580
  34. 96
  35. 596
  36. 580
  37. 316
  38. 248
  39. 76
  40. 344

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