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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 111 · 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. 1.75 × 4 =
  2. 2.42 × 4 =
  3. 3.19 × 8 =
  4. 4.133 × 4 =
  5. 5.54 × 8 =
  6. 6.113 × 4 =
  7. 7.27 × 4 =
  8. 8.72 × 8 =
  9. 9.65 × 4 =
  10. 10.14 × 8 =
  11. 11.125 × 4 =
  12. 12.69 × 8 =
  13. 13.15 × 4 =
  14. 14.87 × 4 =
  15. 15.37 × 4 =
  16. 16.16 × 8 =
  17. 17.70 × 8 =
  18. 18.25 × 8 =
  19. 19.55 × 8 =
  20. 20.119 × 4 =
  21. 21.132 × 4 =
  22. 22.27 × 8 =
  23. 23.90 × 4 =
  24. 24.56 × 8 =
  25. 25.142 × 4 =
  26. 26.41 × 4 =
  27. 27.44 × 8 =
  28. 28.25 × 4 =
  29. 29.51 × 8 =
  30. 30.43 × 8 =
  31. 31.66 × 4 =
  32. 32.110 × 4 =
  33. 33.33 × 4 =
  34. 34.46 × 8 =
  35. 35.63 × 8 =
  36. 36.51 × 8 =
  37. 37.56 × 8 =
  38. 38.24 × 4 =
  39. 39.58 × 4 =
  40. 40.65 × 4 =

Answer key

  1. 300
  2. 168
  3. 152
  4. 532
  5. 432
  6. 452
  7. 108
  8. 576
  9. 260
  10. 112
  11. 500
  12. 552
  13. 60
  14. 348
  15. 148
  16. 128
  17. 560
  18. 200
  19. 440
  20. 476
  21. 528
  22. 216
  23. 360
  24. 448
  25. 568
  26. 164
  27. 352
  28. 100
  29. 408
  30. 344
  31. 264
  32. 440
  33. 132
  34. 368
  35. 504
  36. 408
  37. 448
  38. 96
  39. 232
  40. 260

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