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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 983 · 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. 1.67 × 4 =
  2. 2.45 × 4 =
  3. 3.70 × 8 =
  4. 4.46 × 8 =
  5. 5.21 × 8 =
  6. 6.36 × 4 =
  7. 7.74 × 8 =
  8. 8.58 × 8 =
  9. 9.92 × 4 =
  10. 10.22 × 8 =
  11. 11.68 × 8 =
  12. 12.29 × 8 =
  13. 13.50 × 4 =
  14. 14.18 × 8 =
  15. 15.57 × 4 =
  16. 16.64 × 8 =
  17. 17.57 × 4 =
  18. 18.63 × 8 =
  19. 19.32 × 8 =
  20. 20.74 × 4 =
  21. 21.54 × 8 =
  22. 22.111 × 4 =
  23. 23.129 × 4 =
  24. 24.36 × 4 =
  25. 25.61 × 4 =
  26. 26.62 × 8 =
  27. 27.43 × 8 =
  28. 28.116 × 4 =
  29. 29.21 × 4 =
  30. 30.102 × 4 =
  31. 31.12 × 8 =
  32. 32.51 × 8 =
  33. 33.46 × 8 =
  34. 34.55 × 8 =
  35. 35.42 × 4 =
  36. 36.50 × 8 =
  37. 37.86 × 4 =
  38. 38.36 × 8 =
  39. 39.20 × 4 =
  40. 40.153 × 4 =

Answer key

  1. 268
  2. 180
  3. 560
  4. 368
  5. 168
  6. 144
  7. 592
  8. 464
  9. 368
  10. 176
  11. 544
  12. 232
  13. 200
  14. 144
  15. 228
  16. 512
  17. 228
  18. 504
  19. 256
  20. 296
  21. 432
  22. 444
  23. 516
  24. 144
  25. 244
  26. 496
  27. 344
  28. 464
  29. 84
  30. 408
  31. 96
  32. 408
  33. 368
  34. 440
  35. 168
  36. 400
  37. 344
  38. 288
  39. 80
  40. 612

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