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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 728 · 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. 1.70 × 8 =
  2. 2.73 × 8 =
  3. 3.44 × 8 =
  4. 4.35 × 4 =
  5. 5.43 × 8 =
  6. 6.47 × 4 =
  7. 7.35 × 4 =
  8. 8.55 × 4 =
  9. 9.66 × 4 =
  10. 10.35 × 4 =
  11. 11.158 × 4 =
  12. 12.31 × 8 =
  13. 13.85 × 4 =
  14. 14.111 × 4 =
  15. 15.12 × 8 =
  16. 16.61 × 8 =
  17. 17.39 × 4 =
  18. 18.107 × 4 =
  19. 19.33 × 8 =
  20. 20.24 × 4 =
  21. 21.141 × 4 =
  22. 22.40 × 8 =
  23. 23.50 × 8 =
  24. 24.59 × 8 =
  25. 25.59 × 8 =
  26. 26.19 × 4 =
  27. 27.21 × 8 =
  28. 28.144 × 4 =
  29. 29.120 × 4 =
  30. 30.49 × 8 =
  31. 31.44 × 8 =
  32. 32.139 × 4 =
  33. 33.14 × 8 =
  34. 34.24 × 8 =
  35. 35.69 × 8 =
  36. 36.14 × 8 =
  37. 37.71 × 4 =
  38. 38.57 × 4 =
  39. 39.57 × 8 =
  40. 40.40 × 4 =

Answer key

  1. 560
  2. 584
  3. 352
  4. 140
  5. 344
  6. 188
  7. 140
  8. 220
  9. 264
  10. 140
  11. 632
  12. 248
  13. 340
  14. 444
  15. 96
  16. 488
  17. 156
  18. 428
  19. 264
  20. 96
  21. 564
  22. 320
  23. 400
  24. 472
  25. 472
  26. 76
  27. 168
  28. 576
  29. 480
  30. 392
  31. 352
  32. 556
  33. 112
  34. 192
  35. 552
  36. 112
  37. 284
  38. 228
  39. 456
  40. 160

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