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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 41 · 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. 1.103 × 4 =
  2. 2.70 × 8 =
  3. 3.109 × 4 =
  4. 4.14 × 8 =
  5. 5.22 × 8 =
  6. 6.55 × 8 =
  7. 7.111 × 4 =
  8. 8.158 × 4 =
  9. 9.18 × 8 =
  10. 10.122 × 4 =
  11. 11.46 × 4 =
  12. 12.73 × 4 =
  13. 13.37 × 8 =
  14. 14.41 × 8 =
  15. 15.23 × 4 =
  16. 16.105 × 4 =
  17. 17.23 × 8 =
  18. 18.87 × 4 =
  19. 19.27 × 8 =
  20. 20.136 × 4 =
  21. 21.13 × 4 =
  22. 22.144 × 4 =
  23. 23.18 × 8 =
  24. 24.19 × 8 =
  25. 25.114 × 4 =
  26. 26.16 × 4 =
  27. 27.107 × 4 =
  28. 28.92 × 4 =
  29. 29.29 × 8 =
  30. 30.45 × 8 =
  31. 31.37 × 8 =
  32. 32.23 × 8 =
  33. 33.77 × 4 =
  34. 34.44 × 8 =
  35. 35.32 × 8 =
  36. 36.27 × 8 =
  37. 37.34 × 8 =
  38. 38.75 × 8 =
  39. 39.39 × 4 =
  40. 40.37 × 4 =

Answer key

  1. 412
  2. 560
  3. 436
  4. 112
  5. 176
  6. 440
  7. 444
  8. 632
  9. 144
  10. 488
  11. 184
  12. 292
  13. 296
  14. 328
  15. 92
  16. 420
  17. 184
  18. 348
  19. 216
  20. 544
  21. 52
  22. 576
  23. 144
  24. 152
  25. 456
  26. 64
  27. 428
  28. 368
  29. 232
  30. 360
  31. 296
  32. 184
  33. 308
  34. 352
  35. 256
  36. 216
  37. 272
  38. 600
  39. 156
  40. 148

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