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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 940 · 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. 1.57 × 8 =
  2. 2.96 × 4 =
  3. 3.60 × 8 =
  4. 4.114 × 4 =
  5. 5.138 × 4 =
  6. 6.69 × 4 =
  7. 7.68 × 8 =
  8. 8.25 × 4 =
  9. 9.35 × 8 =
  10. 10.110 × 4 =
  11. 11.106 × 4 =
  12. 12.159 × 4 =
  13. 13.33 × 8 =
  14. 14.100 × 4 =
  15. 15.95 × 4 =
  16. 16.40 × 8 =
  17. 17.59 × 8 =
  18. 18.44 × 4 =
  19. 19.14 × 4 =
  20. 20.47 × 8 =
  21. 21.25 × 8 =
  22. 22.18 × 8 =
  23. 23.13 × 8 =
  24. 24.28 × 8 =
  25. 25.30 × 8 =
  26. 26.21 × 8 =
  27. 27.21 × 4 =
  28. 28.20 × 8 =
  29. 29.64 × 8 =
  30. 30.60 × 8 =
  31. 31.21 × 8 =
  32. 32.116 × 4 =
  33. 33.16 × 8 =
  34. 34.51 × 8 =
  35. 35.41 × 8 =
  36. 36.145 × 4 =
  37. 37.56 × 8 =
  38. 38.66 × 8 =
  39. 39.73 × 8 =
  40. 40.87 × 4 =

Answer key

  1. 456
  2. 384
  3. 480
  4. 456
  5. 552
  6. 276
  7. 544
  8. 100
  9. 280
  10. 440
  11. 424
  12. 636
  13. 264
  14. 400
  15. 380
  16. 320
  17. 472
  18. 176
  19. 56
  20. 376
  21. 200
  22. 144
  23. 104
  24. 224
  25. 240
  26. 168
  27. 84
  28. 160
  29. 512
  30. 480
  31. 168
  32. 464
  33. 128
  34. 408
  35. 328
  36. 580
  37. 448
  38. 528
  39. 584
  40. 348

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