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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 142 · 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. 1.50 × 4 =
  2. 2.17 × 4 =
  3. 3.149 × 4 =
  4. 4.12 × 8 =
  5. 5.109 × 4 =
  6. 6.44 × 4 =
  7. 7.52 × 8 =
  8. 8.67 × 8 =
  9. 9.30 × 8 =
  10. 10.152 × 4 =
  11. 11.48 × 8 =
  12. 12.119 × 4 =
  13. 13.25 × 8 =
  14. 14.35 × 8 =
  15. 15.50 × 8 =
  16. 16.29 × 8 =
  17. 17.19 × 8 =
  18. 18.56 × 8 =
  19. 19.41 × 4 =
  20. 20.45 × 4 =
  21. 21.73 × 8 =
  22. 22.155 × 4 =
  23. 23.129 × 4 =
  24. 24.14 × 8 =
  25. 25.26 × 8 =
  26. 26.19 × 4 =
  27. 27.52 × 4 =
  28. 28.24 × 8 =
  29. 29.21 × 4 =
  30. 30.48 × 4 =
  31. 31.123 × 4 =
  32. 32.22 × 8 =
  33. 33.144 × 4 =
  34. 34.47 × 8 =
  35. 35.67 × 8 =
  36. 36.90 × 4 =
  37. 37.46 × 4 =
  38. 38.50 × 8 =
  39. 39.32 × 8 =
  40. 40.22 × 4 =

Answer key

  1. 200
  2. 68
  3. 596
  4. 96
  5. 436
  6. 176
  7. 416
  8. 536
  9. 240
  10. 608
  11. 384
  12. 476
  13. 200
  14. 280
  15. 400
  16. 232
  17. 152
  18. 448
  19. 164
  20. 180
  21. 584
  22. 620
  23. 516
  24. 112
  25. 208
  26. 76
  27. 208
  28. 192
  29. 84
  30. 192
  31. 492
  32. 176
  33. 576
  34. 376
  35. 536
  36. 360
  37. 184
  38. 400
  39. 256
  40. 88

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