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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 663 · 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. 1.152 × 4 =
  2. 2.35 × 4 =
  3. 3.132 × 4 =
  4. 4.86 × 4 =
  5. 5.120 × 4 =
  6. 6.66 × 8 =
  7. 7.61 × 8 =
  8. 8.123 × 4 =
  9. 9.154 × 4 =
  10. 10.46 × 4 =
  11. 11.26 × 8 =
  12. 12.41 × 8 =
  13. 13.22 × 8 =
  14. 14.39 × 8 =
  15. 15.71 × 4 =
  16. 16.14 × 8 =
  17. 17.53 × 8 =
  18. 18.108 × 4 =
  19. 19.62 × 8 =
  20. 20.72 × 8 =
  21. 21.20 × 8 =
  22. 22.111 × 4 =
  23. 23.37 × 8 =
  24. 24.61 × 8 =
  25. 25.32 × 8 =
  26. 26.63 × 4 =
  27. 27.44 × 8 =
  28. 28.46 × 8 =
  29. 29.158 × 4 =
  30. 30.15 × 8 =
  31. 31.119 × 4 =
  32. 32.15 × 8 =
  33. 33.88 × 4 =
  34. 34.55 × 4 =
  35. 35.60 × 8 =
  36. 36.54 × 4 =
  37. 37.106 × 4 =
  38. 38.138 × 4 =
  39. 39.103 × 4 =
  40. 40.54 × 8 =

Answer key

  1. 608
  2. 140
  3. 528
  4. 344
  5. 480
  6. 528
  7. 488
  8. 492
  9. 616
  10. 184
  11. 208
  12. 328
  13. 176
  14. 312
  15. 284
  16. 112
  17. 424
  18. 432
  19. 496
  20. 576
  21. 160
  22. 444
  23. 296
  24. 488
  25. 256
  26. 252
  27. 352
  28. 368
  29. 632
  30. 120
  31. 476
  32. 120
  33. 352
  34. 220
  35. 480
  36. 216
  37. 424
  38. 552
  39. 412
  40. 432

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