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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 306 · 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. 1.135 × 4 =
  2. 2.62 × 4 =
  3. 3.60 × 4 =
  4. 4.39 × 4 =
  5. 5.143 × 4 =
  6. 6.153 × 4 =
  7. 7.67 × 4 =
  8. 8.31 × 4 =
  9. 9.17 × 8 =
  10. 10.20 × 8 =
  11. 11.54 × 4 =
  12. 12.63 × 8 =
  13. 13.21 × 8 =
  14. 14.21 × 8 =
  15. 15.22 × 8 =
  16. 16.30 × 8 =
  17. 17.88 × 4 =
  18. 18.12 × 8 =
  19. 19.22 × 4 =
  20. 20.15 × 4 =
  21. 21.55 × 8 =
  22. 22.92 × 4 =
  23. 23.60 × 8 =
  24. 24.126 × 4 =
  25. 25.143 × 4 =
  26. 26.40 × 8 =
  27. 27.15 × 4 =
  28. 28.48 × 4 =
  29. 29.62 × 8 =
  30. 30.27 × 8 =
  31. 31.31 × 8 =
  32. 32.132 × 4 =
  33. 33.132 × 4 =
  34. 34.39 × 8 =
  35. 35.31 × 8 =
  36. 36.17 × 8 =
  37. 37.39 × 4 =
  38. 38.19 × 4 =
  39. 39.47 × 4 =
  40. 40.112 × 4 =

Answer key

  1. 540
  2. 248
  3. 240
  4. 156
  5. 572
  6. 612
  7. 268
  8. 124
  9. 136
  10. 160
  11. 216
  12. 504
  13. 168
  14. 168
  15. 176
  16. 240
  17. 352
  18. 96
  19. 88
  20. 60
  21. 440
  22. 368
  23. 480
  24. 504
  25. 572
  26. 320
  27. 60
  28. 192
  29. 496
  30. 216
  31. 248
  32. 528
  33. 528
  34. 312
  35. 248
  36. 136
  37. 156
  38. 76
  39. 188
  40. 448

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