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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 26 · 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. 1.16 × 8 =
  2. 2.83 × 4 =
  3. 3.53 × 4 =
  4. 4.142 × 4 =
  5. 5.104 × 4 =
  6. 6.114 × 4 =
  7. 7.119 × 4 =
  8. 8.57 × 8 =
  9. 9.115 × 4 =
  10. 10.141 × 4 =
  11. 11.21 × 4 =
  12. 12.74 × 4 =
  13. 13.34 × 4 =
  14. 14.158 × 4 =
  15. 15.16 × 8 =
  16. 16.70 × 8 =
  17. 17.56 × 4 =
  18. 18.21 × 4 =
  19. 19.50 × 8 =
  20. 20.103 × 4 =
  21. 21.146 × 4 =
  22. 22.40 × 8 =
  23. 23.16 × 8 =
  24. 24.63 × 8 =
  25. 25.12 × 8 =
  26. 26.128 × 4 =
  27. 27.59 × 4 =
  28. 28.51 × 8 =
  29. 29.69 × 4 =
  30. 30.28 × 4 =
  31. 31.52 × 8 =
  32. 32.38 × 8 =
  33. 33.23 × 8 =
  34. 34.14 × 4 =
  35. 35.73 × 4 =
  36. 36.76 × 4 =
  37. 37.24 × 4 =
  38. 38.55 × 8 =
  39. 39.97 × 4 =
  40. 40.54 × 8 =

Answer key

  1. 128
  2. 332
  3. 212
  4. 568
  5. 416
  6. 456
  7. 476
  8. 456
  9. 460
  10. 564
  11. 84
  12. 296
  13. 136
  14. 632
  15. 128
  16. 560
  17. 224
  18. 84
  19. 400
  20. 412
  21. 584
  22. 320
  23. 128
  24. 504
  25. 96
  26. 512
  27. 236
  28. 408
  29. 276
  30. 112
  31. 416
  32. 304
  33. 184
  34. 56
  35. 292
  36. 304
  37. 96
  38. 440
  39. 388
  40. 432

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