← Doubling sprints: × 4 and × 8 lesson New set →

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 270 · 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. 1.26 × 8 =
  2. 2.27 × 4 =
  3. 3.118 × 4 =
  4. 4.66 × 8 =
  5. 5.31 × 4 =
  6. 6.92 × 4 =
  7. 7.39 × 8 =
  8. 8.152 × 4 =
  9. 9.158 × 4 =
  10. 10.64 × 8 =
  11. 11.20 × 8 =
  12. 12.105 × 4 =
  13. 13.42 × 4 =
  14. 14.25 × 8 =
  15. 15.27 × 4 =
  16. 16.30 × 8 =
  17. 17.33 × 8 =
  18. 18.30 × 8 =
  19. 19.65 × 4 =
  20. 20.73 × 8 =
  21. 21.105 × 4 =
  22. 22.84 × 4 =
  23. 23.22 × 4 =
  24. 24.104 × 4 =
  25. 25.24 × 4 =
  26. 26.26 × 8 =
  27. 27.139 × 4 =
  28. 28.64 × 8 =
  29. 29.14 × 8 =
  30. 30.148 × 4 =
  31. 31.124 × 4 =
  32. 32.65 × 8 =
  33. 33.48 × 8 =
  34. 34.40 × 4 =
  35. 35.49 × 4 =
  36. 36.85 × 4 =
  37. 37.154 × 4 =
  38. 38.16 × 8 =
  39. 39.132 × 4 =
  40. 40.59 × 4 =

Answer key

  1. 208
  2. 108
  3. 472
  4. 528
  5. 124
  6. 368
  7. 312
  8. 608
  9. 632
  10. 512
  11. 160
  12. 420
  13. 168
  14. 200
  15. 108
  16. 240
  17. 264
  18. 240
  19. 260
  20. 584
  21. 420
  22. 336
  23. 88
  24. 416
  25. 96
  26. 208
  27. 556
  28. 512
  29. 112
  30. 592
  31. 496
  32. 520
  33. 384
  34. 160
  35. 196
  36. 340
  37. 616
  38. 128
  39. 528
  40. 236

Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths