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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 883 · 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. 1.12 × 8 =
  2. 2.19 × 8 =
  3. 3.64 × 4 =
  4. 4.118 × 4 =
  5. 5.50 × 8 =
  6. 6.37 × 4 =
  7. 7.158 × 4 =
  8. 8.14 × 4 =
  9. 9.61 × 4 =
  10. 10.42 × 4 =
  11. 11.158 × 4 =
  12. 12.108 × 4 =
  13. 13.23 × 8 =
  14. 14.69 × 8 =
  15. 15.111 × 4 =
  16. 16.36 × 8 =
  17. 17.18 × 8 =
  18. 18.23 × 4 =
  19. 19.14 × 8 =
  20. 20.21 × 8 =
  21. 21.70 × 4 =
  22. 22.27 × 8 =
  23. 23.50 × 8 =
  24. 24.107 × 4 =
  25. 25.65 × 4 =
  26. 26.127 × 4 =
  27. 27.77 × 4 =
  28. 28.94 × 4 =
  29. 29.17 × 8 =
  30. 30.13 × 8 =
  31. 31.44 × 8 =
  32. 32.131 × 4 =
  33. 33.17 × 8 =
  34. 34.16 × 8 =
  35. 35.26 × 8 =
  36. 36.78 × 4 =
  37. 37.63 × 4 =
  38. 38.31 × 4 =
  39. 39.53 × 8 =
  40. 40.60 × 4 =

Answer key

  1. 96
  2. 152
  3. 256
  4. 472
  5. 400
  6. 148
  7. 632
  8. 56
  9. 244
  10. 168
  11. 632
  12. 432
  13. 184
  14. 552
  15. 444
  16. 288
  17. 144
  18. 92
  19. 112
  20. 168
  21. 280
  22. 216
  23. 400
  24. 428
  25. 260
  26. 508
  27. 308
  28. 376
  29. 136
  30. 104
  31. 352
  32. 524
  33. 136
  34. 128
  35. 208
  36. 312
  37. 252
  38. 124
  39. 424
  40. 240

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