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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 220 · 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. 1.86 × 4 =
  2. 2.135 × 4 =
  3. 3.69 × 4 =
  4. 4.44 × 4 =
  5. 5.45 × 8 =
  6. 6.18 × 4 =
  7. 7.33 × 4 =
  8. 8.157 × 4 =
  9. 9.24 × 8 =
  10. 10.154 × 4 =
  11. 11.93 × 4 =
  12. 12.32 × 8 =
  13. 13.133 × 4 =
  14. 14.20 × 8 =
  15. 15.65 × 4 =
  16. 16.31 × 4 =
  17. 17.149 × 4 =
  18. 18.38 × 8 =
  19. 19.25 × 4 =
  20. 20.65 × 8 =
  21. 21.63 × 8 =
  22. 22.35 × 4 =
  23. 23.34 × 4 =
  24. 24.70 × 8 =
  25. 25.64 × 8 =
  26. 26.33 × 8 =
  27. 27.55 × 4 =
  28. 28.109 × 4 =
  29. 29.120 × 4 =
  30. 30.40 × 4 =
  31. 31.71 × 4 =
  32. 32.72 × 8 =
  33. 33.57 × 8 =
  34. 34.138 × 4 =
  35. 35.144 × 4 =
  36. 36.120 × 4 =
  37. 37.158 × 4 =
  38. 38.20 × 8 =
  39. 39.58 × 4 =
  40. 40.64 × 4 =

Answer key

  1. 344
  2. 540
  3. 276
  4. 176
  5. 360
  6. 72
  7. 132
  8. 628
  9. 192
  10. 616
  11. 372
  12. 256
  13. 532
  14. 160
  15. 260
  16. 124
  17. 596
  18. 304
  19. 100
  20. 520
  21. 504
  22. 140
  23. 136
  24. 560
  25. 512
  26. 264
  27. 220
  28. 436
  29. 480
  30. 160
  31. 284
  32. 576
  33. 456
  34. 552
  35. 576
  36. 480
  37. 632
  38. 160
  39. 232
  40. 256

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