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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 261 · 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. 1.35 × 4 =
  2. 2.35 × 8 =
  3. 3.63 × 8 =
  4. 4.27 × 8 =
  5. 5.52 × 4 =
  6. 6.43 × 8 =
  7. 7.21 × 8 =
  8. 8.19 × 4 =
  9. 9.37 × 8 =
  10. 10.52 × 8 =
  11. 11.21 × 8 =
  12. 12.61 × 8 =
  13. 13.41 × 8 =
  14. 14.17 × 8 =
  15. 15.23 × 8 =
  16. 16.57 × 8 =
  17. 17.24 × 8 =
  18. 18.158 × 4 =
  19. 19.37 × 8 =
  20. 20.12 × 8 =
  21. 21.51 × 8 =
  22. 22.156 × 4 =
  23. 23.75 × 4 =
  24. 24.56 × 8 =
  25. 25.60 × 8 =
  26. 26.112 × 4 =
  27. 27.70 × 8 =
  28. 28.34 × 8 =
  29. 29.74 × 8 =
  30. 30.38 × 8 =
  31. 31.95 × 4 =
  32. 32.65 × 4 =
  33. 33.15 × 8 =
  34. 34.70 × 8 =
  35. 35.51 × 8 =
  36. 36.73 × 8 =
  37. 37.149 × 4 =
  38. 38.157 × 4 =
  39. 39.63 × 8 =
  40. 40.63 × 8 =

Answer key

  1. 140
  2. 280
  3. 504
  4. 216
  5. 208
  6. 344
  7. 168
  8. 76
  9. 296
  10. 416
  11. 168
  12. 488
  13. 328
  14. 136
  15. 184
  16. 456
  17. 192
  18. 632
  19. 296
  20. 96
  21. 408
  22. 624
  23. 300
  24. 448
  25. 480
  26. 448
  27. 560
  28. 272
  29. 592
  30. 304
  31. 380
  32. 260
  33. 120
  34. 560
  35. 408
  36. 584
  37. 596
  38. 628
  39. 504
  40. 504

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