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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 901 · 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. 1.29 × 8 =
  2. 2.30 × 8 =
  3. 3.153 × 4 =
  4. 4.153 × 4 =
  5. 5.69 × 4 =
  6. 6.119 × 4 =
  7. 7.62 × 4 =
  8. 8.22 × 8 =
  9. 9.47 × 8 =
  10. 10.29 × 8 =
  11. 11.20 × 4 =
  12. 12.26 × 8 =
  13. 13.98 × 4 =
  14. 14.37 × 4 =
  15. 15.111 × 4 =
  16. 16.30 × 8 =
  17. 17.26 × 4 =
  18. 18.151 × 4 =
  19. 19.92 × 4 =
  20. 20.68 × 4 =
  21. 21.56 × 8 =
  22. 22.31 × 8 =
  23. 23.107 × 4 =
  24. 24.28 × 4 =
  25. 25.51 × 8 =
  26. 26.41 × 8 =
  27. 27.66 × 4 =
  28. 28.150 × 4 =
  29. 29.140 × 4 =
  30. 30.88 × 4 =
  31. 31.37 × 4 =
  32. 32.60 × 8 =
  33. 33.153 × 4 =
  34. 34.45 × 8 =
  35. 35.51 × 4 =
  36. 36.58 × 4 =
  37. 37.12 × 8 =
  38. 38.59 × 8 =
  39. 39.23 × 8 =
  40. 40.150 × 4 =

Answer key

  1. 232
  2. 240
  3. 612
  4. 612
  5. 276
  6. 476
  7. 248
  8. 176
  9. 376
  10. 232
  11. 80
  12. 208
  13. 392
  14. 148
  15. 444
  16. 240
  17. 104
  18. 604
  19. 368
  20. 272
  21. 448
  22. 248
  23. 428
  24. 112
  25. 408
  26. 328
  27. 264
  28. 600
  29. 560
  30. 352
  31. 148
  32. 480
  33. 612
  34. 360
  35. 204
  36. 232
  37. 96
  38. 472
  39. 184
  40. 600

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