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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 63 · 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. 1.22 × 4 =
  2. 2.51 × 4 =
  3. 3.106 × 4 =
  4. 4.41 × 8 =
  5. 5.69 × 8 =
  6. 6.22 × 4 =
  7. 7.44 × 8 =
  8. 8.115 × 4 =
  9. 9.137 × 4 =
  10. 10.40 × 8 =
  11. 11.13 × 4 =
  12. 12.137 × 4 =
  13. 13.143 × 4 =
  14. 14.75 × 8 =
  15. 15.41 × 8 =
  16. 16.58 × 8 =
  17. 17.77 × 4 =
  18. 18.22 × 8 =
  19. 19.49 × 4 =
  20. 20.152 × 4 =
  21. 21.61 × 8 =
  22. 22.13 × 8 =
  23. 23.64 × 8 =
  24. 24.158 × 4 =
  25. 25.19 × 8 =
  26. 26.12 × 8 =
  27. 27.14 × 8 =
  28. 28.26 × 8 =
  29. 29.37 × 8 =
  30. 30.149 × 4 =
  31. 31.116 × 4 =
  32. 32.50 × 8 =
  33. 33.23 × 4 =
  34. 34.14 × 8 =
  35. 35.129 × 4 =
  36. 36.72 × 8 =
  37. 37.56 × 8 =
  38. 38.94 × 4 =
  39. 39.15 × 4 =
  40. 40.35 × 8 =

Answer key

  1. 88
  2. 204
  3. 424
  4. 328
  5. 552
  6. 88
  7. 352
  8. 460
  9. 548
  10. 320
  11. 52
  12. 548
  13. 572
  14. 600
  15. 328
  16. 464
  17. 308
  18. 176
  19. 196
  20. 608
  21. 488
  22. 104
  23. 512
  24. 632
  25. 152
  26. 96
  27. 112
  28. 208
  29. 296
  30. 596
  31. 464
  32. 400
  33. 92
  34. 112
  35. 516
  36. 576
  37. 448
  38. 376
  39. 60
  40. 280

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