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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 332 · 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. 1.110 × 4 =
  2. 2.85 × 4 =
  3. 3.52 × 4 =
  4. 4.123 × 4 =
  5. 5.152 × 4 =
  6. 6.65 × 4 =
  7. 7.25 × 8 =
  8. 8.119 × 4 =
  9. 9.20 × 8 =
  10. 10.13 × 8 =
  11. 11.52 × 8 =
  12. 12.20 × 8 =
  13. 13.125 × 4 =
  14. 14.25 × 8 =
  15. 15.92 × 4 =
  16. 16.144 × 4 =
  17. 17.51 × 4 =
  18. 18.25 × 4 =
  19. 19.21 × 4 =
  20. 20.15 × 8 =
  21. 21.54 × 4 =
  22. 22.33 × 8 =
  23. 23.55 × 8 =
  24. 24.17 × 4 =
  25. 25.148 × 4 =
  26. 26.44 × 8 =
  27. 27.17 × 8 =
  28. 28.46 × 4 =
  29. 29.39 × 8 =
  30. 30.156 × 4 =
  31. 31.31 × 8 =
  32. 32.113 × 4 =
  33. 33.23 × 8 =
  34. 34.15 × 8 =
  35. 35.84 × 4 =
  36. 36.74 × 8 =
  37. 37.139 × 4 =
  38. 38.61 × 8 =
  39. 39.21 × 8 =
  40. 40.41 × 4 =

Answer key

  1. 440
  2. 340
  3. 208
  4. 492
  5. 608
  6. 260
  7. 200
  8. 476
  9. 160
  10. 104
  11. 416
  12. 160
  13. 500
  14. 200
  15. 368
  16. 576
  17. 204
  18. 100
  19. 84
  20. 120
  21. 216
  22. 264
  23. 440
  24. 68
  25. 592
  26. 352
  27. 136
  28. 184
  29. 312
  30. 624
  31. 248
  32. 452
  33. 184
  34. 120
  35. 336
  36. 592
  37. 556
  38. 488
  39. 168
  40. 164

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