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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 433 · 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. 1.23 × 8 =
  2. 2.113 × 4 =
  3. 3.127 × 4 =
  4. 4.26 × 8 =
  5. 5.55 × 8 =
  6. 6.34 × 8 =
  7. 7.18 × 8 =
  8. 8.42 × 8 =
  9. 9.66 × 8 =
  10. 10.30 × 8 =
  11. 11.45 × 8 =
  12. 12.28 × 4 =
  13. 13.60 × 4 =
  14. 14.30 × 4 =
  15. 15.94 × 4 =
  16. 16.128 × 4 =
  17. 17.23 × 8 =
  18. 18.45 × 8 =
  19. 19.75 × 8 =
  20. 20.21 × 8 =
  21. 21.30 × 4 =
  22. 22.19 × 8 =
  23. 23.37 × 4 =
  24. 24.143 × 4 =
  25. 25.58 × 8 =
  26. 26.104 × 4 =
  27. 27.90 × 4 =
  28. 28.47 × 8 =
  29. 29.61 × 8 =
  30. 30.33 × 8 =
  31. 31.20 × 8 =
  32. 32.144 × 4 =
  33. 33.93 × 4 =
  34. 34.14 × 4 =
  35. 35.51 × 4 =
  36. 36.55 × 8 =
  37. 37.92 × 4 =
  38. 38.149 × 4 =
  39. 39.55 × 4 =
  40. 40.18 × 8 =

Answer key

  1. 184
  2. 452
  3. 508
  4. 208
  5. 440
  6. 272
  7. 144
  8. 336
  9. 528
  10. 240
  11. 360
  12. 112
  13. 240
  14. 120
  15. 376
  16. 512
  17. 184
  18. 360
  19. 600
  20. 168
  21. 120
  22. 152
  23. 148
  24. 572
  25. 464
  26. 416
  27. 360
  28. 376
  29. 488
  30. 264
  31. 160
  32. 576
  33. 372
  34. 56
  35. 204
  36. 440
  37. 368
  38. 596
  39. 220
  40. 144

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