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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 824 · 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. 1.114 × 4 =
  2. 2.58 × 8 =
  3. 3.104 × 4 =
  4. 4.67 × 8 =
  5. 5.46 × 4 =
  6. 6.154 × 4 =
  7. 7.66 × 8 =
  8. 8.154 × 4 =
  9. 9.100 × 4 =
  10. 10.51 × 4 =
  11. 11.28 × 8 =
  12. 12.49 × 4 =
  13. 13.22 × 8 =
  14. 14.17 × 8 =
  15. 15.65 × 8 =
  16. 16.87 × 4 =
  17. 17.160 × 4 =
  18. 18.123 × 4 =
  19. 19.150 × 4 =
  20. 20.18 × 8 =
  21. 21.142 × 4 =
  22. 22.21 × 4 =
  23. 23.69 × 4 =
  24. 24.115 × 4 =
  25. 25.25 × 4 =
  26. 26.60 × 8 =
  27. 27.71 × 4 =
  28. 28.25 × 4 =
  29. 29.16 × 4 =
  30. 30.14 × 4 =
  31. 31.95 × 4 =
  32. 32.37 × 8 =
  33. 33.19 × 4 =
  34. 34.28 × 4 =
  35. 35.59 × 4 =
  36. 36.26 × 8 =
  37. 37.154 × 4 =
  38. 38.41 × 4 =
  39. 39.47 × 8 =
  40. 40.106 × 4 =

Answer key

  1. 456
  2. 464
  3. 416
  4. 536
  5. 184
  6. 616
  7. 528
  8. 616
  9. 400
  10. 204
  11. 224
  12. 196
  13. 176
  14. 136
  15. 520
  16. 348
  17. 640
  18. 492
  19. 600
  20. 144
  21. 568
  22. 84
  23. 276
  24. 460
  25. 100
  26. 480
  27. 284
  28. 100
  29. 64
  30. 56
  31. 380
  32. 296
  33. 76
  34. 112
  35. 236
  36. 208
  37. 616
  38. 164
  39. 376
  40. 424

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