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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 533 · 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. 1.69 × 8 =
  2. 2.40 × 8 =
  3. 3.80 × 4 =
  4. 4.16 × 8 =
  5. 5.139 × 4 =
  6. 6.132 × 4 =
  7. 7.69 × 4 =
  8. 8.124 × 4 =
  9. 9.57 × 4 =
  10. 10.13 × 8 =
  11. 11.108 × 4 =
  12. 12.36 × 4 =
  13. 13.32 × 8 =
  14. 14.58 × 8 =
  15. 15.40 × 8 =
  16. 16.52 × 8 =
  17. 17.12 × 8 =
  18. 18.32 × 4 =
  19. 19.109 × 4 =
  20. 20.122 × 4 =
  21. 21.21 × 8 =
  22. 22.54 × 8 =
  23. 23.130 × 4 =
  24. 24.34 × 4 =
  25. 25.69 × 8 =
  26. 26.114 × 4 =
  27. 27.51 × 8 =
  28. 28.60 × 8 =
  29. 29.13 × 8 =
  30. 30.61 × 8 =
  31. 31.15 × 8 =
  32. 32.22 × 4 =
  33. 33.40 × 8 =
  34. 34.21 × 8 =
  35. 35.66 × 8 =
  36. 36.16 × 8 =
  37. 37.74 × 4 =
  38. 38.67 × 8 =
  39. 39.113 × 4 =
  40. 40.12 × 8 =

Answer key

  1. 552
  2. 320
  3. 320
  4. 128
  5. 556
  6. 528
  7. 276
  8. 496
  9. 228
  10. 104
  11. 432
  12. 144
  13. 256
  14. 464
  15. 320
  16. 416
  17. 96
  18. 128
  19. 436
  20. 488
  21. 168
  22. 432
  23. 520
  24. 136
  25. 552
  26. 456
  27. 408
  28. 480
  29. 104
  30. 488
  31. 120
  32. 88
  33. 320
  34. 168
  35. 528
  36. 128
  37. 296
  38. 536
  39. 452
  40. 96

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