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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 881 · 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. 1.148 × 4 =
  2. 2.18 × 8 =
  3. 3.74 × 4 =
  4. 4.23 × 8 =
  5. 5.13 × 4 =
  6. 6.65 × 8 =
  7. 7.137 × 4 =
  8. 8.63 × 4 =
  9. 9.97 × 4 =
  10. 10.152 × 4 =
  11. 11.20 × 4 =
  12. 12.30 × 4 =
  13. 13.141 × 4 =
  14. 14.82 × 4 =
  15. 15.22 × 4 =
  16. 16.20 × 8 =
  17. 17.13 × 8 =
  18. 18.21 × 8 =
  19. 19.57 × 8 =
  20. 20.29 × 8 =
  21. 21.99 × 4 =
  22. 22.32 × 8 =
  23. 23.23 × 8 =
  24. 24.68 × 4 =
  25. 25.19 × 4 =
  26. 26.34 × 4 =
  27. 27.24 × 8 =
  28. 28.52 × 8 =
  29. 29.88 × 4 =
  30. 30.49 × 4 =
  31. 31.52 × 8 =
  32. 32.116 × 4 =
  33. 33.18 × 8 =
  34. 34.139 × 4 =
  35. 35.42 × 8 =
  36. 36.29 × 8 =
  37. 37.41 × 4 =
  38. 38.82 × 4 =
  39. 39.158 × 4 =
  40. 40.24 × 8 =

Answer key

  1. 592
  2. 144
  3. 296
  4. 184
  5. 52
  6. 520
  7. 548
  8. 252
  9. 388
  10. 608
  11. 80
  12. 120
  13. 564
  14. 328
  15. 88
  16. 160
  17. 104
  18. 168
  19. 456
  20. 232
  21. 396
  22. 256
  23. 184
  24. 272
  25. 76
  26. 136
  27. 192
  28. 416
  29. 352
  30. 196
  31. 416
  32. 464
  33. 144
  34. 556
  35. 336
  36. 232
  37. 164
  38. 328
  39. 632
  40. 192

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