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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 598 · 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. 1.70 × 4 =
  2. 2.59 × 4 =
  3. 3.39 × 8 =
  4. 4.25 × 8 =
  5. 5.16 × 8 =
  6. 6.113 × 4 =
  7. 7.41 × 4 =
  8. 8.14 × 4 =
  9. 9.45 × 8 =
  10. 10.70 × 8 =
  11. 11.110 × 4 =
  12. 12.32 × 4 =
  13. 13.75 × 4 =
  14. 14.27 × 8 =
  15. 15.147 × 4 =
  16. 16.17 × 8 =
  17. 17.153 × 4 =
  18. 18.21 × 8 =
  19. 19.48 × 8 =
  20. 20.33 × 8 =
  21. 21.56 × 8 =
  22. 22.85 × 4 =
  23. 23.17 × 4 =
  24. 24.18 × 8 =
  25. 25.65 × 8 =
  26. 26.73 × 4 =
  27. 27.61 × 8 =
  28. 28.123 × 4 =
  29. 29.143 × 4 =
  30. 30.70 × 8 =
  31. 31.55 × 8 =
  32. 32.43 × 8 =
  33. 33.139 × 4 =
  34. 34.69 × 4 =
  35. 35.64 × 8 =
  36. 36.43 × 4 =
  37. 37.20 × 8 =
  38. 38.25 × 8 =
  39. 39.33 × 4 =
  40. 40.52 × 8 =

Answer key

  1. 280
  2. 236
  3. 312
  4. 200
  5. 128
  6. 452
  7. 164
  8. 56
  9. 360
  10. 560
  11. 440
  12. 128
  13. 300
  14. 216
  15. 588
  16. 136
  17. 612
  18. 168
  19. 384
  20. 264
  21. 448
  22. 340
  23. 68
  24. 144
  25. 520
  26. 292
  27. 488
  28. 492
  29. 572
  30. 560
  31. 440
  32. 344
  33. 556
  34. 276
  35. 512
  36. 172
  37. 160
  38. 200
  39. 132
  40. 416

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