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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 708 · 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. 1.77 × 4 =
  2. 2.15 × 8 =
  3. 3.59 × 8 =
  4. 4.41 × 8 =
  5. 5.65 × 8 =
  6. 6.38 × 8 =
  7. 7.23 × 4 =
  8. 8.13 × 8 =
  9. 9.30 × 8 =
  10. 10.14 × 4 =
  11. 11.63 × 8 =
  12. 12.25 × 4 =
  13. 13.40 × 4 =
  14. 14.62 × 8 =
  15. 15.38 × 8 =
  16. 16.34 × 8 =
  17. 17.14 × 4 =
  18. 18.31 × 8 =
  19. 19.68 × 8 =
  20. 20.19 × 8 =
  21. 21.56 × 8 =
  22. 22.32 × 8 =
  23. 23.144 × 4 =
  24. 24.65 × 4 =
  25. 25.71 × 4 =
  26. 26.97 × 4 =
  27. 27.70 × 4 =
  28. 28.26 × 4 =
  29. 29.70 × 8 =
  30. 30.56 × 8 =
  31. 31.129 × 4 =
  32. 32.88 × 4 =
  33. 33.51 × 4 =
  34. 34.46 × 8 =
  35. 35.146 × 4 =
  36. 36.53 × 8 =
  37. 37.114 × 4 =
  38. 38.60 × 8 =
  39. 39.130 × 4 =
  40. 40.155 × 4 =

Answer key

  1. 308
  2. 120
  3. 472
  4. 328
  5. 520
  6. 304
  7. 92
  8. 104
  9. 240
  10. 56
  11. 504
  12. 100
  13. 160
  14. 496
  15. 304
  16. 272
  17. 56
  18. 248
  19. 544
  20. 152
  21. 448
  22. 256
  23. 576
  24. 260
  25. 284
  26. 388
  27. 280
  28. 104
  29. 560
  30. 448
  31. 516
  32. 352
  33. 204
  34. 368
  35. 584
  36. 424
  37. 456
  38. 480
  39. 520
  40. 620

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