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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 363 · 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. 1.48 × 4 =
  2. 2.67 × 8 =
  3. 3.12 × 8 =
  4. 4.140 × 4 =
  5. 5.30 × 8 =
  6. 6.26 × 8 =
  7. 7.75 × 4 =
  8. 8.35 × 8 =
  9. 9.69 × 4 =
  10. 10.20 × 8 =
  11. 11.148 × 4 =
  12. 12.37 × 8 =
  13. 13.40 × 4 =
  14. 14.74 × 8 =
  15. 15.154 × 4 =
  16. 16.17 × 8 =
  17. 17.23 × 8 =
  18. 18.33 × 4 =
  19. 19.159 × 4 =
  20. 20.21 × 4 =
  21. 21.47 × 8 =
  22. 22.42 × 4 =
  23. 23.24 × 8 =
  24. 24.35 × 8 =
  25. 25.56 × 4 =
  26. 26.91 × 4 =
  27. 27.14 × 8 =
  28. 28.158 × 4 =
  29. 29.58 × 8 =
  30. 30.41 × 8 =
  31. 31.44 × 8 =
  32. 32.111 × 4 =
  33. 33.32 × 8 =
  34. 34.16 × 8 =
  35. 35.73 × 8 =
  36. 36.151 × 4 =
  37. 37.25 × 4 =
  38. 38.117 × 4 =
  39. 39.55 × 4 =
  40. 40.41 × 4 =

Answer key

  1. 192
  2. 536
  3. 96
  4. 560
  5. 240
  6. 208
  7. 300
  8. 280
  9. 276
  10. 160
  11. 592
  12. 296
  13. 160
  14. 592
  15. 616
  16. 136
  17. 184
  18. 132
  19. 636
  20. 84
  21. 376
  22. 168
  23. 192
  24. 280
  25. 224
  26. 364
  27. 112
  28. 632
  29. 464
  30. 328
  31. 352
  32. 444
  33. 256
  34. 128
  35. 584
  36. 604
  37. 100
  38. 468
  39. 220
  40. 164

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