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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 797 · 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. 1.66 × 8 =
  2. 2.65 × 8 =
  3. 3.40 × 4 =
  4. 4.17 × 8 =
  5. 5.19 × 4 =
  6. 6.51 × 4 =
  7. 7.35 × 8 =
  8. 8.106 × 4 =
  9. 9.158 × 4 =
  10. 10.14 × 4 =
  11. 11.42 × 8 =
  12. 12.57 × 8 =
  13. 13.138 × 4 =
  14. 14.80 × 4 =
  15. 15.25 × 8 =
  16. 16.43 × 4 =
  17. 17.72 × 4 =
  18. 18.147 × 4 =
  19. 19.118 × 4 =
  20. 20.84 × 4 =
  21. 21.33 × 4 =
  22. 22.53 × 8 =
  23. 23.70 × 4 =
  24. 24.20 × 8 =
  25. 25.42 × 8 =
  26. 26.27 × 4 =
  27. 27.56 × 4 =
  28. 28.16 × 4 =
  29. 29.22 × 8 =
  30. 30.101 × 4 =
  31. 31.81 × 4 =
  32. 32.35 × 4 =
  33. 33.17 × 8 =
  34. 34.42 × 4 =
  35. 35.56 × 8 =
  36. 36.138 × 4 =
  37. 37.75 × 8 =
  38. 38.17 × 4 =
  39. 39.71 × 4 =
  40. 40.14 × 4 =

Answer key

  1. 528
  2. 520
  3. 160
  4. 136
  5. 76
  6. 204
  7. 280
  8. 424
  9. 632
  10. 56
  11. 336
  12. 456
  13. 552
  14. 320
  15. 200
  16. 172
  17. 288
  18. 588
  19. 472
  20. 336
  21. 132
  22. 424
  23. 280
  24. 160
  25. 336
  26. 108
  27. 224
  28. 64
  29. 176
  30. 404
  31. 324
  32. 140
  33. 136
  34. 168
  35. 448
  36. 552
  37. 600
  38. 68
  39. 284
  40. 56

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