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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 232 · 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. 1.56 × 8 =
  2. 2.69 × 8 =
  3. 3.78 × 4 =
  4. 4.37 × 8 =
  5. 5.15 × 8 =
  6. 6.45 × 8 =
  7. 7.18 × 8 =
  8. 8.127 × 4 =
  9. 9.142 × 4 =
  10. 10.35 × 8 =
  11. 11.17 × 8 =
  12. 12.36 × 4 =
  13. 13.114 × 4 =
  14. 14.25 × 8 =
  15. 15.21 × 8 =
  16. 16.52 × 8 =
  17. 17.12 × 8 =
  18. 18.37 × 8 =
  19. 19.74 × 8 =
  20. 20.28 × 8 =
  21. 21.40 × 8 =
  22. 22.64 × 4 =
  23. 23.19 × 8 =
  24. 24.44 × 4 =
  25. 25.33 × 8 =
  26. 26.107 × 4 =
  27. 27.28 × 8 =
  28. 28.29 × 4 =
  29. 29.28 × 8 =
  30. 30.21 × 8 =
  31. 31.47 × 4 =
  32. 32.64 × 4 =
  33. 33.30 × 4 =
  34. 34.135 × 4 =
  35. 35.47 × 8 =
  36. 36.55 × 8 =
  37. 37.24 × 8 =
  38. 38.65 × 8 =
  39. 39.33 × 8 =
  40. 40.63 × 8 =

Answer key

  1. 448
  2. 552
  3. 312
  4. 296
  5. 120
  6. 360
  7. 144
  8. 508
  9. 568
  10. 280
  11. 136
  12. 144
  13. 456
  14. 200
  15. 168
  16. 416
  17. 96
  18. 296
  19. 592
  20. 224
  21. 320
  22. 256
  23. 152
  24. 176
  25. 264
  26. 428
  27. 224
  28. 116
  29. 224
  30. 168
  31. 188
  32. 256
  33. 120
  34. 540
  35. 376
  36. 440
  37. 192
  38. 520
  39. 264
  40. 504

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