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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 384 · 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. 1.155 × 4 =
  2. 2.73 × 8 =
  3. 3.30 × 8 =
  4. 4.46 × 4 =
  5. 5.48 × 4 =
  6. 6.16 × 8 =
  7. 7.70 × 4 =
  8. 8.31 × 8 =
  9. 9.57 × 8 =
  10. 10.121 × 4 =
  11. 11.57 × 4 =
  12. 12.51 × 8 =
  13. 13.60 × 8 =
  14. 14.90 × 4 =
  15. 15.95 × 4 =
  16. 16.68 × 8 =
  17. 17.14 × 8 =
  18. 18.34 × 4 =
  19. 19.60 × 4 =
  20. 20.23 × 8 =
  21. 21.12 × 8 =
  22. 22.36 × 8 =
  23. 23.51 × 8 =
  24. 24.26 × 8 =
  25. 25.20 × 8 =
  26. 26.40 × 8 =
  27. 27.147 × 4 =
  28. 28.132 × 4 =
  29. 29.136 × 4 =
  30. 30.115 × 4 =
  31. 31.86 × 4 =
  32. 32.160 × 4 =
  33. 33.34 × 8 =
  34. 34.41 × 8 =
  35. 35.49 × 4 =
  36. 36.60 × 4 =
  37. 37.106 × 4 =
  38. 38.42 × 4 =
  39. 39.53 × 8 =
  40. 40.17 × 4 =

Answer key

  1. 620
  2. 584
  3. 240
  4. 184
  5. 192
  6. 128
  7. 280
  8. 248
  9. 456
  10. 484
  11. 228
  12. 408
  13. 480
  14. 360
  15. 380
  16. 544
  17. 112
  18. 136
  19. 240
  20. 184
  21. 96
  22. 288
  23. 408
  24. 208
  25. 160
  26. 320
  27. 588
  28. 528
  29. 544
  30. 460
  31. 344
  32. 640
  33. 272
  34. 328
  35. 196
  36. 240
  37. 424
  38. 168
  39. 424
  40. 68

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