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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 934 · 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. 1.42 × 8 =
  2. 2.132 × 4 =
  3. 3.57 × 8 =
  4. 4.41 × 8 =
  5. 5.20 × 8 =
  6. 6.78 × 4 =
  7. 7.37 × 4 =
  8. 8.60 × 4 =
  9. 9.144 × 4 =
  10. 10.103 × 4 =
  11. 11.53 × 8 =
  12. 12.73 × 8 =
  13. 13.29 × 8 =
  14. 14.46 × 4 =
  15. 15.122 × 4 =
  16. 16.92 × 4 =
  17. 17.135 × 4 =
  18. 18.24 × 8 =
  19. 19.50 × 4 =
  20. 20.95 × 4 =
  21. 21.54 × 4 =
  22. 22.122 × 4 =
  23. 23.142 × 4 =
  24. 24.17 × 8 =
  25. 25.75 × 8 =
  26. 26.93 × 4 =
  27. 27.94 × 4 =
  28. 28.14 × 8 =
  29. 29.14 × 8 =
  30. 30.60 × 8 =
  31. 31.160 × 4 =
  32. 32.77 × 4 =
  33. 33.40 × 8 =
  34. 34.89 × 4 =
  35. 35.152 × 4 =
  36. 36.97 × 4 =
  37. 37.58 × 8 =
  38. 38.24 × 8 =
  39. 39.55 × 4 =
  40. 40.60 × 8 =

Answer key

  1. 336
  2. 528
  3. 456
  4. 328
  5. 160
  6. 312
  7. 148
  8. 240
  9. 576
  10. 412
  11. 424
  12. 584
  13. 232
  14. 184
  15. 488
  16. 368
  17. 540
  18. 192
  19. 200
  20. 380
  21. 216
  22. 488
  23. 568
  24. 136
  25. 600
  26. 372
  27. 376
  28. 112
  29. 112
  30. 480
  31. 640
  32. 308
  33. 320
  34. 356
  35. 608
  36. 388
  37. 464
  38. 192
  39. 220
  40. 480

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