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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 859 · 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. 1.102 × 4 =
  2. 2.14 × 4 =
  3. 3.45 × 8 =
  4. 4.40 × 4 =
  5. 5.159 × 4 =
  6. 6.31 × 4 =
  7. 7.18 × 8 =
  8. 8.112 × 4 =
  9. 9.134 × 4 =
  10. 10.126 × 4 =
  11. 11.24 × 8 =
  12. 12.70 × 8 =
  13. 13.63 × 4 =
  14. 14.85 × 4 =
  15. 15.15 × 8 =
  16. 16.49 × 4 =
  17. 17.50 × 4 =
  18. 18.146 × 4 =
  19. 19.58 × 8 =
  20. 20.19 × 8 =
  21. 21.56 × 4 =
  22. 22.136 × 4 =
  23. 23.125 × 4 =
  24. 24.120 × 4 =
  25. 25.18 × 4 =
  26. 26.70 × 8 =
  27. 27.30 × 8 =
  28. 28.50 × 4 =
  29. 29.106 × 4 =
  30. 30.18 × 4 =
  31. 31.75 × 4 =
  32. 32.61 × 8 =
  33. 33.160 × 4 =
  34. 34.44 × 8 =
  35. 35.94 × 4 =
  36. 36.135 × 4 =
  37. 37.52 × 8 =
  38. 38.64 × 8 =
  39. 39.52 × 8 =
  40. 40.37 × 4 =

Answer key

  1. 408
  2. 56
  3. 360
  4. 160
  5. 636
  6. 124
  7. 144
  8. 448
  9. 536
  10. 504
  11. 192
  12. 560
  13. 252
  14. 340
  15. 120
  16. 196
  17. 200
  18. 584
  19. 464
  20. 152
  21. 224
  22. 544
  23. 500
  24. 480
  25. 72
  26. 560
  27. 240
  28. 200
  29. 424
  30. 72
  31. 300
  32. 488
  33. 640
  34. 352
  35. 376
  36. 540
  37. 416
  38. 512
  39. 416
  40. 148

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