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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 257 · 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. 1.19 × 4 =
  2. 2.17 × 4 =
  3. 3.52 × 4 =
  4. 4.144 × 4 =
  5. 5.65 × 4 =
  6. 6.111 × 4 =
  7. 7.22 × 8 =
  8. 8.39 × 8 =
  9. 9.18 × 4 =
  10. 10.70 × 8 =
  11. 11.115 × 4 =
  12. 12.31 × 8 =
  13. 13.35 × 8 =
  14. 14.16 × 4 =
  15. 15.61 × 8 =
  16. 16.40 × 4 =
  17. 17.57 × 8 =
  18. 18.33 × 4 =
  19. 19.47 × 4 =
  20. 20.27 × 8 =
  21. 21.29 × 8 =
  22. 22.139 × 4 =
  23. 23.13 × 4 =
  24. 24.30 × 4 =
  25. 25.30 × 4 =
  26. 26.30 × 4 =
  27. 27.59 × 4 =
  28. 28.46 × 4 =
  29. 29.64 × 8 =
  30. 30.142 × 4 =
  31. 31.106 × 4 =
  32. 32.38 × 8 =
  33. 33.124 × 4 =
  34. 34.152 × 4 =
  35. 35.41 × 4 =
  36. 36.83 × 4 =
  37. 37.47 × 8 =
  38. 38.47 × 8 =
  39. 39.89 × 4 =
  40. 40.114 × 4 =

Answer key

  1. 76
  2. 68
  3. 208
  4. 576
  5. 260
  6. 444
  7. 176
  8. 312
  9. 72
  10. 560
  11. 460
  12. 248
  13. 280
  14. 64
  15. 488
  16. 160
  17. 456
  18. 132
  19. 188
  20. 216
  21. 232
  22. 556
  23. 52
  24. 120
  25. 120
  26. 120
  27. 236
  28. 184
  29. 512
  30. 568
  31. 424
  32. 304
  33. 496
  34. 608
  35. 164
  36. 332
  37. 376
  38. 376
  39. 356
  40. 456

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