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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 500 · 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. 1.20 × 8 =
  2. 2.116 × 4 =
  3. 3.25 × 8 =
  4. 4.56 × 8 =
  5. 5.58 × 8 =
  6. 6.63 × 8 =
  7. 7.32 × 8 =
  8. 8.121 × 4 =
  9. 9.83 × 4 =
  10. 10.41 × 4 =
  11. 11.73 × 8 =
  12. 12.26 × 4 =
  13. 13.15 × 8 =
  14. 14.100 × 4 =
  15. 15.29 × 8 =
  16. 16.61 × 8 =
  17. 17.55 × 8 =
  18. 18.119 × 4 =
  19. 19.129 × 4 =
  20. 20.52 × 8 =
  21. 21.120 × 4 =
  22. 22.71 × 4 =
  23. 23.22 × 8 =
  24. 24.84 × 4 =
  25. 25.124 × 4 =
  26. 26.50 × 8 =
  27. 27.69 × 8 =
  28. 28.22 × 8 =
  29. 29.40 × 8 =
  30. 30.31 × 4 =
  31. 31.76 × 4 =
  32. 32.53 × 4 =
  33. 33.53 × 8 =
  34. 34.61 × 8 =
  35. 35.49 × 4 =
  36. 36.22 × 8 =
  37. 37.56 × 8 =
  38. 38.75 × 8 =
  39. 39.19 × 4 =
  40. 40.49 × 8 =

Answer key

  1. 160
  2. 464
  3. 200
  4. 448
  5. 464
  6. 504
  7. 256
  8. 484
  9. 332
  10. 164
  11. 584
  12. 104
  13. 120
  14. 400
  15. 232
  16. 488
  17. 440
  18. 476
  19. 516
  20. 416
  21. 480
  22. 284
  23. 176
  24. 336
  25. 496
  26. 400
  27. 552
  28. 176
  29. 320
  30. 124
  31. 304
  32. 212
  33. 424
  34. 488
  35. 196
  36. 176
  37. 448
  38. 600
  39. 76
  40. 392

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