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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 133 · 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. 1.34 × 4 =
  2. 2.21 × 8 =
  3. 3.58 × 8 =
  4. 4.18 × 8 =
  5. 5.154 × 4 =
  6. 6.12 × 8 =
  7. 7.89 × 4 =
  8. 8.26 × 8 =
  9. 9.45 × 4 =
  10. 10.119 × 4 =
  11. 11.21 × 8 =
  12. 12.14 × 4 =
  13. 13.137 × 4 =
  14. 14.53 × 8 =
  15. 15.113 × 4 =
  16. 16.152 × 4 =
  17. 17.25 × 8 =
  18. 18.39 × 4 =
  19. 19.87 × 4 =
  20. 20.29 × 8 =
  21. 21.80 × 4 =
  22. 22.132 × 4 =
  23. 23.17 × 4 =
  24. 24.100 × 4 =
  25. 25.17 × 4 =
  26. 26.46 × 8 =
  27. 27.27 × 8 =
  28. 28.69 × 8 =
  29. 29.156 × 4 =
  30. 30.16 × 8 =
  31. 31.50 × 8 =
  32. 32.17 × 8 =
  33. 33.57 × 4 =
  34. 34.35 × 8 =
  35. 35.53 × 8 =
  36. 36.29 × 8 =
  37. 37.51 × 8 =
  38. 38.12 × 8 =
  39. 39.81 × 4 =
  40. 40.153 × 4 =

Answer key

  1. 136
  2. 168
  3. 464
  4. 144
  5. 616
  6. 96
  7. 356
  8. 208
  9. 180
  10. 476
  11. 168
  12. 56
  13. 548
  14. 424
  15. 452
  16. 608
  17. 200
  18. 156
  19. 348
  20. 232
  21. 320
  22. 528
  23. 68
  24. 400
  25. 68
  26. 368
  27. 216
  28. 552
  29. 624
  30. 128
  31. 400
  32. 136
  33. 228
  34. 280
  35. 424
  36. 232
  37. 408
  38. 96
  39. 324
  40. 612

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