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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 131 · 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. 1.15 × 8 =
  2. 2.24 × 8 =
  3. 3.94 × 4 =
  4. 4.86 × 4 =
  5. 5.23 × 8 =
  6. 6.86 × 4 =
  7. 7.67 × 8 =
  8. 8.62 × 4 =
  9. 9.28 × 8 =
  10. 10.118 × 4 =
  11. 11.123 × 4 =
  12. 12.18 × 8 =
  13. 13.70 × 8 =
  14. 14.25 × 4 =
  15. 15.141 × 4 =
  16. 16.75 × 4 =
  17. 17.62 × 8 =
  18. 18.52 × 8 =
  19. 19.32 × 8 =
  20. 20.52 × 8 =
  21. 21.92 × 4 =
  22. 22.53 × 8 =
  23. 23.56 × 8 =
  24. 24.56 × 8 =
  25. 25.150 × 4 =
  26. 26.22 × 4 =
  27. 27.23 × 8 =
  28. 28.17 × 8 =
  29. 29.106 × 4 =
  30. 30.48 × 8 =
  31. 31.112 × 4 =
  32. 32.149 × 4 =
  33. 33.75 × 8 =
  34. 34.99 × 4 =
  35. 35.41 × 4 =
  36. 36.35 × 4 =
  37. 37.132 × 4 =
  38. 38.25 × 8 =
  39. 39.41 × 4 =
  40. 40.45 × 4 =

Answer key

  1. 120
  2. 192
  3. 376
  4. 344
  5. 184
  6. 344
  7. 536
  8. 248
  9. 224
  10. 472
  11. 492
  12. 144
  13. 560
  14. 100
  15. 564
  16. 300
  17. 496
  18. 416
  19. 256
  20. 416
  21. 368
  22. 424
  23. 448
  24. 448
  25. 600
  26. 88
  27. 184
  28. 136
  29. 424
  30. 384
  31. 448
  32. 596
  33. 600
  34. 396
  35. 164
  36. 140
  37. 528
  38. 200
  39. 164
  40. 180

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