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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 422 · 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. 1.110 × 4 =
  2. 2.13 × 8 =
  3. 3.63 × 8 =
  4. 4.46 × 8 =
  5. 5.65 × 4 =
  6. 6.155 × 4 =
  7. 7.45 × 4 =
  8. 8.48 × 8 =
  9. 9.36 × 4 =
  10. 10.36 × 8 =
  11. 11.93 × 4 =
  12. 12.155 × 4 =
  13. 13.72 × 4 =
  14. 14.22 × 8 =
  15. 15.19 × 4 =
  16. 16.26 × 8 =
  17. 17.16 × 8 =
  18. 18.71 × 8 =
  19. 19.112 × 4 =
  20. 20.159 × 4 =
  21. 21.14 × 4 =
  22. 22.59 × 4 =
  23. 23.44 × 8 =
  24. 24.83 × 4 =
  25. 25.75 × 4 =
  26. 26.154 × 4 =
  27. 27.111 × 4 =
  28. 28.57 × 4 =
  29. 29.106 × 4 =
  30. 30.31 × 8 =
  31. 31.45 × 8 =
  32. 32.34 × 4 =
  33. 33.27 × 8 =
  34. 34.39 × 4 =
  35. 35.42 × 4 =
  36. 36.76 × 4 =
  37. 37.65 × 8 =
  38. 38.50 × 8 =
  39. 39.45 × 4 =
  40. 40.68 × 4 =

Answer key

  1. 440
  2. 104
  3. 504
  4. 368
  5. 260
  6. 620
  7. 180
  8. 384
  9. 144
  10. 288
  11. 372
  12. 620
  13. 288
  14. 176
  15. 76
  16. 208
  17. 128
  18. 568
  19. 448
  20. 636
  21. 56
  22. 236
  23. 352
  24. 332
  25. 300
  26. 616
  27. 444
  28. 228
  29. 424
  30. 248
  31. 360
  32. 136
  33. 216
  34. 156
  35. 168
  36. 304
  37. 520
  38. 400
  39. 180
  40. 272

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