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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 195 · 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. 1.65 × 8 =
  2. 2.40 × 8 =
  3. 3.160 × 4 =
  4. 4.21 × 8 =
  5. 5.52 × 8 =
  6. 6.103 × 4 =
  7. 7.30 × 8 =
  8. 8.17 × 4 =
  9. 9.41 × 8 =
  10. 10.65 × 4 =
  11. 11.74 × 8 =
  12. 12.136 × 4 =
  13. 13.23 × 8 =
  14. 14.56 × 8 =
  15. 15.27 × 8 =
  16. 16.126 × 4 =
  17. 17.159 × 4 =
  18. 18.22 × 8 =
  19. 19.21 × 8 =
  20. 20.35 × 8 =
  21. 21.142 × 4 =
  22. 22.38 × 4 =
  23. 23.74 × 4 =
  24. 24.29 × 4 =
  25. 25.90 × 4 =
  26. 26.97 × 4 =
  27. 27.103 × 4 =
  28. 28.102 × 4 =
  29. 29.73 × 8 =
  30. 30.57 × 8 =
  31. 31.33 × 8 =
  32. 32.52 × 8 =
  33. 33.69 × 8 =
  34. 34.69 × 8 =
  35. 35.30 × 8 =
  36. 36.62 × 8 =
  37. 37.50 × 8 =
  38. 38.33 × 4 =
  39. 39.57 × 8 =
  40. 40.118 × 4 =

Answer key

  1. 520
  2. 320
  3. 640
  4. 168
  5. 416
  6. 412
  7. 240
  8. 68
  9. 328
  10. 260
  11. 592
  12. 544
  13. 184
  14. 448
  15. 216
  16. 504
  17. 636
  18. 176
  19. 168
  20. 280
  21. 568
  22. 152
  23. 296
  24. 116
  25. 360
  26. 388
  27. 412
  28. 408
  29. 584
  30. 456
  31. 264
  32. 416
  33. 552
  34. 552
  35. 240
  36. 496
  37. 400
  38. 132
  39. 456
  40. 472

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