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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 790 · 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. 1.67 × 8 =
  2. 2.30 × 8 =
  3. 3.66 × 4 =
  4. 4.34 × 8 =
  5. 5.112 × 4 =
  6. 6.24 × 4 =
  7. 7.57 × 8 =
  8. 8.38 × 8 =
  9. 9.30 × 8 =
  10. 10.53 × 4 =
  11. 11.37 × 4 =
  12. 12.19 × 4 =
  13. 13.94 × 4 =
  14. 14.29 × 4 =
  15. 15.33 × 4 =
  16. 16.52 × 4 =
  17. 17.80 × 4 =
  18. 18.123 × 4 =
  19. 19.29 × 4 =
  20. 20.102 × 4 =
  21. 21.152 × 4 =
  22. 22.34 × 4 =
  23. 23.30 × 4 =
  24. 24.38 × 4 =
  25. 25.21 × 8 =
  26. 26.136 × 4 =
  27. 27.73 × 8 =
  28. 28.52 × 8 =
  29. 29.40 × 4 =
  30. 30.155 × 4 =
  31. 31.18 × 8 =
  32. 32.62 × 8 =
  33. 33.27 × 4 =
  34. 34.55 × 8 =
  35. 35.71 × 8 =
  36. 36.41 × 8 =
  37. 37.30 × 8 =
  38. 38.74 × 8 =
  39. 39.117 × 4 =
  40. 40.85 × 4 =

Answer key

  1. 536
  2. 240
  3. 264
  4. 272
  5. 448
  6. 96
  7. 456
  8. 304
  9. 240
  10. 212
  11. 148
  12. 76
  13. 376
  14. 116
  15. 132
  16. 208
  17. 320
  18. 492
  19. 116
  20. 408
  21. 608
  22. 136
  23. 120
  24. 152
  25. 168
  26. 544
  27. 584
  28. 416
  29. 160
  30. 620
  31. 144
  32. 496
  33. 108
  34. 440
  35. 568
  36. 328
  37. 240
  38. 592
  39. 468
  40. 340

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