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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 630 · 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. 1.20 × 8 =
  2. 2.101 × 4 =
  3. 3.140 × 4 =
  4. 4.129 × 4 =
  5. 5.32 × 4 =
  6. 6.30 × 8 =
  7. 7.22 × 8 =
  8. 8.154 × 4 =
  9. 9.72 × 4 =
  10. 10.25 × 8 =
  11. 11.36 × 4 =
  12. 12.109 × 4 =
  13. 13.37 × 4 =
  14. 14.88 × 4 =
  15. 15.60 × 8 =
  16. 16.21 × 8 =
  17. 17.18 × 8 =
  18. 18.18 × 8 =
  19. 19.69 × 8 =
  20. 20.41 × 8 =
  21. 21.132 × 4 =
  22. 22.47 × 4 =
  23. 23.66 × 8 =
  24. 24.140 × 4 =
  25. 25.22 × 4 =
  26. 26.23 × 4 =
  27. 27.38 × 8 =
  28. 28.45 × 8 =
  29. 29.15 × 8 =
  30. 30.48 × 4 =
  31. 31.20 × 8 =
  32. 32.66 × 8 =
  33. 33.14 × 4 =
  34. 34.146 × 4 =
  35. 35.126 × 4 =
  36. 36.101 × 4 =
  37. 37.38 × 8 =
  38. 38.24 × 4 =
  39. 39.148 × 4 =
  40. 40.96 × 4 =

Answer key

  1. 160
  2. 404
  3. 560
  4. 516
  5. 128
  6. 240
  7. 176
  8. 616
  9. 288
  10. 200
  11. 144
  12. 436
  13. 148
  14. 352
  15. 480
  16. 168
  17. 144
  18. 144
  19. 552
  20. 328
  21. 528
  22. 188
  23. 528
  24. 560
  25. 88
  26. 92
  27. 304
  28. 360
  29. 120
  30. 192
  31. 160
  32. 528
  33. 56
  34. 584
  35. 504
  36. 404
  37. 304
  38. 96
  39. 592
  40. 384

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