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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 794 · 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. 1.110 × 4 =
  2. 2.46 × 4 =
  3. 3.75 × 8 =
  4. 4.63 × 4 =
  5. 5.159 × 4 =
  6. 6.57 × 4 =
  7. 7.148 × 4 =
  8. 8.28 × 8 =
  9. 9.16 × 8 =
  10. 10.46 × 8 =
  11. 11.72 × 8 =
  12. 12.113 × 4 =
  13. 13.31 × 8 =
  14. 14.48 × 8 =
  15. 15.16 × 8 =
  16. 16.158 × 4 =
  17. 17.81 × 4 =
  18. 18.48 × 4 =
  19. 19.74 × 8 =
  20. 20.19 × 8 =
  21. 21.44 × 4 =
  22. 22.88 × 4 =
  23. 23.119 × 4 =
  24. 24.42 × 4 =
  25. 25.99 × 4 =
  26. 26.35 × 4 =
  27. 27.114 × 4 =
  28. 28.54 × 8 =
  29. 29.34 × 8 =
  30. 30.23 × 8 =
  31. 31.46 × 8 =
  32. 32.66 × 8 =
  33. 33.45 × 8 =
  34. 34.142 × 4 =
  35. 35.17 × 8 =
  36. 36.113 × 4 =
  37. 37.53 × 4 =
  38. 38.28 × 8 =
  39. 39.36 × 4 =
  40. 40.78 × 4 =

Answer key

  1. 440
  2. 184
  3. 600
  4. 252
  5. 636
  6. 228
  7. 592
  8. 224
  9. 128
  10. 368
  11. 576
  12. 452
  13. 248
  14. 384
  15. 128
  16. 632
  17. 324
  18. 192
  19. 592
  20. 152
  21. 176
  22. 352
  23. 476
  24. 168
  25. 396
  26. 140
  27. 456
  28. 432
  29. 272
  30. 184
  31. 368
  32. 528
  33. 360
  34. 568
  35. 136
  36. 452
  37. 212
  38. 224
  39. 144
  40. 312

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