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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 858 · 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. 1.41 × 8 =
  2. 2.106 × 4 =
  3. 3.131 × 4 =
  4. 4.62 × 8 =
  5. 5.92 × 4 =
  6. 6.18 × 4 =
  7. 7.152 × 4 =
  8. 8.137 × 4 =
  9. 9.105 × 4 =
  10. 10.42 × 8 =
  11. 11.67 × 4 =
  12. 12.13 × 4 =
  13. 13.149 × 4 =
  14. 14.118 × 4 =
  15. 15.29 × 4 =
  16. 16.39 × 8 =
  17. 17.43 × 4 =
  18. 18.101 × 4 =
  19. 19.30 × 4 =
  20. 20.16 × 8 =
  21. 21.142 × 4 =
  22. 22.27 × 8 =
  23. 23.130 × 4 =
  24. 24.122 × 4 =
  25. 25.47 × 8 =
  26. 26.17 × 4 =
  27. 27.128 × 4 =
  28. 28.29 × 8 =
  29. 29.29 × 4 =
  30. 30.32 × 8 =
  31. 31.80 × 4 =
  32. 32.24 × 8 =
  33. 33.92 × 4 =
  34. 34.14 × 8 =
  35. 35.18 × 4 =
  36. 36.139 × 4 =
  37. 37.15 × 8 =
  38. 38.90 × 4 =
  39. 39.58 × 4 =
  40. 40.51 × 8 =

Answer key

  1. 328
  2. 424
  3. 524
  4. 496
  5. 368
  6. 72
  7. 608
  8. 548
  9. 420
  10. 336
  11. 268
  12. 52
  13. 596
  14. 472
  15. 116
  16. 312
  17. 172
  18. 404
  19. 120
  20. 128
  21. 568
  22. 216
  23. 520
  24. 488
  25. 376
  26. 68
  27. 512
  28. 232
  29. 116
  30. 256
  31. 320
  32. 192
  33. 368
  34. 112
  35. 72
  36. 556
  37. 120
  38. 360
  39. 232
  40. 408

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