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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 877 · 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. 1.22 × 8 =
  2. 2.44 × 8 =
  3. 3.72 × 4 =
  4. 4.16 × 8 =
  5. 5.88 × 4 =
  6. 6.143 × 4 =
  7. 7.60 × 8 =
  8. 8.42 × 8 =
  9. 9.28 × 8 =
  10. 10.81 × 4 =
  11. 11.86 × 4 =
  12. 12.138 × 4 =
  13. 13.45 × 4 =
  14. 14.37 × 4 =
  15. 15.20 × 4 =
  16. 16.36 × 8 =
  17. 17.109 × 4 =
  18. 18.36 × 4 =
  19. 19.42 × 8 =
  20. 20.61 × 8 =
  21. 21.13 × 4 =
  22. 22.48 × 4 =
  23. 23.138 × 4 =
  24. 24.61 × 4 =
  25. 25.22 × 8 =
  26. 26.145 × 4 =
  27. 27.64 × 8 =
  28. 28.94 × 4 =
  29. 29.73 × 4 =
  30. 30.63 × 4 =
  31. 31.39 × 8 =
  32. 32.32 × 8 =
  33. 33.30 × 4 =
  34. 34.59 × 8 =
  35. 35.21 × 8 =
  36. 36.151 × 4 =
  37. 37.56 × 4 =
  38. 38.51 × 8 =
  39. 39.118 × 4 =
  40. 40.133 × 4 =

Answer key

  1. 176
  2. 352
  3. 288
  4. 128
  5. 352
  6. 572
  7. 480
  8. 336
  9. 224
  10. 324
  11. 344
  12. 552
  13. 180
  14. 148
  15. 80
  16. 288
  17. 436
  18. 144
  19. 336
  20. 488
  21. 52
  22. 192
  23. 552
  24. 244
  25. 176
  26. 580
  27. 512
  28. 376
  29. 292
  30. 252
  31. 312
  32. 256
  33. 120
  34. 472
  35. 168
  36. 604
  37. 224
  38. 408
  39. 472
  40. 532

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