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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 674 · 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. 1.152 × 4 =
  2. 2.44 × 8 =
  3. 3.23 × 8 =
  4. 4.68 × 4 =
  5. 5.16 × 8 =
  6. 6.75 × 8 =
  7. 7.20 × 8 =
  8. 8.102 × 4 =
  9. 9.35 × 4 =
  10. 10.98 × 4 =
  11. 11.20 × 4 =
  12. 12.29 × 8 =
  13. 13.25 × 8 =
  14. 14.114 × 4 =
  15. 15.79 × 4 =
  16. 16.89 × 4 =
  17. 17.88 × 4 =
  18. 18.26 × 4 =
  19. 19.24 × 8 =
  20. 20.59 × 4 =
  21. 21.52 × 4 =
  22. 22.88 × 4 =
  23. 23.34 × 8 =
  24. 24.85 × 4 =
  25. 25.51 × 8 =
  26. 26.51 × 8 =
  27. 27.73 × 4 =
  28. 28.112 × 4 =
  29. 29.23 × 8 =
  30. 30.62 × 4 =
  31. 31.97 × 4 =
  32. 32.28 × 8 =
  33. 33.65 × 4 =
  34. 34.70 × 8 =
  35. 35.20 × 8 =
  36. 36.100 × 4 =
  37. 37.82 × 4 =
  38. 38.124 × 4 =
  39. 39.14 × 8 =
  40. 40.151 × 4 =

Answer key

  1. 608
  2. 352
  3. 184
  4. 272
  5. 128
  6. 600
  7. 160
  8. 408
  9. 140
  10. 392
  11. 80
  12. 232
  13. 200
  14. 456
  15. 316
  16. 356
  17. 352
  18. 104
  19. 192
  20. 236
  21. 208
  22. 352
  23. 272
  24. 340
  25. 408
  26. 408
  27. 292
  28. 448
  29. 184
  30. 248
  31. 388
  32. 224
  33. 260
  34. 560
  35. 160
  36. 400
  37. 328
  38. 496
  39. 112
  40. 604

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