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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 472 · 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. 1.55 × 4 =
  2. 2.13 × 8 =
  3. 3.15 × 8 =
  4. 4.67 × 8 =
  5. 5.16 × 8 =
  6. 6.102 × 4 =
  7. 7.84 × 4 =
  8. 8.55 × 4 =
  9. 9.21 × 8 =
  10. 10.65 × 8 =
  11. 11.30 × 8 =
  12. 12.41 × 8 =
  13. 13.38 × 8 =
  14. 14.69 × 8 =
  15. 15.38 × 8 =
  16. 16.126 × 4 =
  17. 17.135 × 4 =
  18. 18.14 × 8 =
  19. 19.156 × 4 =
  20. 20.22 × 8 =
  21. 21.55 × 4 =
  22. 22.36 × 4 =
  23. 23.127 × 4 =
  24. 24.30 × 8 =
  25. 25.27 × 8 =
  26. 26.125 × 4 =
  27. 27.132 × 4 =
  28. 28.59 × 4 =
  29. 29.20 × 8 =
  30. 30.53 × 8 =
  31. 31.94 × 4 =
  32. 32.155 × 4 =
  33. 33.73 × 8 =
  34. 34.60 × 8 =
  35. 35.55 × 8 =
  36. 36.103 × 4 =
  37. 37.41 × 8 =
  38. 38.21 × 8 =
  39. 39.47 × 8 =
  40. 40.14 × 8 =

Answer key

  1. 220
  2. 104
  3. 120
  4. 536
  5. 128
  6. 408
  7. 336
  8. 220
  9. 168
  10. 520
  11. 240
  12. 328
  13. 304
  14. 552
  15. 304
  16. 504
  17. 540
  18. 112
  19. 624
  20. 176
  21. 220
  22. 144
  23. 508
  24. 240
  25. 216
  26. 500
  27. 528
  28. 236
  29. 160
  30. 424
  31. 376
  32. 620
  33. 584
  34. 480
  35. 440
  36. 412
  37. 328
  38. 168
  39. 376
  40. 112

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