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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 908 · 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. 1.61 × 8 =
  2. 2.25 × 4 =
  3. 3.37 × 4 =
  4. 4.21 × 4 =
  5. 5.95 × 4 =
  6. 6.152 × 4 =
  7. 7.30 × 8 =
  8. 8.157 × 4 =
  9. 9.60 × 8 =
  10. 10.94 × 4 =
  11. 11.155 × 4 =
  12. 12.73 × 4 =
  13. 13.72 × 8 =
  14. 14.51 × 8 =
  15. 15.142 × 4 =
  16. 16.69 × 8 =
  17. 17.46 × 8 =
  18. 18.145 × 4 =
  19. 19.94 × 4 =
  20. 20.99 × 4 =
  21. 21.50 × 8 =
  22. 22.104 × 4 =
  23. 23.54 × 8 =
  24. 24.51 × 8 =
  25. 25.132 × 4 =
  26. 26.71 × 4 =
  27. 27.21 × 8 =
  28. 28.66 × 4 =
  29. 29.30 × 8 =
  30. 30.97 × 4 =
  31. 31.130 × 4 =
  32. 32.73 × 8 =
  33. 33.58 × 8 =
  34. 34.14 × 8 =
  35. 35.36 × 8 =
  36. 36.55 × 4 =
  37. 37.32 × 4 =
  38. 38.102 × 4 =
  39. 39.44 × 8 =
  40. 40.72 × 8 =

Answer key

  1. 488
  2. 100
  3. 148
  4. 84
  5. 380
  6. 608
  7. 240
  8. 628
  9. 480
  10. 376
  11. 620
  12. 292
  13. 576
  14. 408
  15. 568
  16. 552
  17. 368
  18. 580
  19. 376
  20. 396
  21. 400
  22. 416
  23. 432
  24. 408
  25. 528
  26. 284
  27. 168
  28. 264
  29. 240
  30. 388
  31. 520
  32. 584
  33. 464
  34. 112
  35. 288
  36. 220
  37. 128
  38. 408
  39. 352
  40. 576

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