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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 600 · 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. 1.110 × 4 =
  2. 2.19 × 4 =
  3. 3.62 × 8 =
  4. 4.43 × 4 =
  5. 5.72 × 8 =
  6. 6.35 × 4 =
  7. 7.102 × 4 =
  8. 8.13 × 8 =
  9. 9.27 × 8 =
  10. 10.16 × 8 =
  11. 11.31 × 8 =
  12. 12.19 × 8 =
  13. 13.12 × 8 =
  14. 14.59 × 8 =
  15. 15.23 × 8 =
  16. 16.62 × 8 =
  17. 17.59 × 4 =
  18. 18.41 × 8 =
  19. 19.23 × 8 =
  20. 20.24 × 8 =
  21. 21.16 × 4 =
  22. 22.29 × 4 =
  23. 23.29 × 8 =
  24. 24.13 × 8 =
  25. 25.145 × 4 =
  26. 26.91 × 4 =
  27. 27.52 × 8 =
  28. 28.12 × 8 =
  29. 29.81 × 4 =
  30. 30.46 × 8 =
  31. 31.82 × 4 =
  32. 32.66 × 8 =
  33. 33.48 × 4 =
  34. 34.15 × 4 =
  35. 35.23 × 4 =
  36. 36.67 × 8 =
  37. 37.116 × 4 =
  38. 38.27 × 8 =
  39. 39.42 × 8 =
  40. 40.145 × 4 =

Answer key

  1. 440
  2. 76
  3. 496
  4. 172
  5. 576
  6. 140
  7. 408
  8. 104
  9. 216
  10. 128
  11. 248
  12. 152
  13. 96
  14. 472
  15. 184
  16. 496
  17. 236
  18. 328
  19. 184
  20. 192
  21. 64
  22. 116
  23. 232
  24. 104
  25. 580
  26. 364
  27. 416
  28. 96
  29. 324
  30. 368
  31. 328
  32. 528
  33. 192
  34. 60
  35. 92
  36. 536
  37. 464
  38. 216
  39. 336
  40. 580

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