← Multiply by 4 and 8 by doubling lesson New set →

Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 891 · 40 questions
TalentJR

How to do it in your head (Double, double, double): × 2: double once. × 4: double, then double again. × 8: double three times.

NameDateTime takenScore ___ / 40
  1. 1.35 × 8 =
  2. 2.19 × 8 =
  3. 3.23 × 8 =
  4. 4.28 × 4 =
  5. 5.20 × 4 =
  6. 6.31 × 4 =
  7. 7.13 × 8 =
  8. 8.67 × 4 =
  9. 9.17 × 4 =
  10. 10.32 × 8 =
  11. 11.30 × 8 =
  12. 12.22 × 8 =
  13. 13.33 × 4 =
  14. 14.43 × 4 =
  15. 15.12 × 8 =
  16. 16.36 × 4 =
  17. 17.70 × 4 =
  18. 18.18 × 8 =
  19. 19.71 × 4 =
  20. 20.21 × 4 =
  21. 21.63 × 4 =
  22. 22.45 × 4 =
  23. 23.14 × 8 =
  24. 24.60 × 4 =
  25. 25.25 × 8 =
  26. 26.30 × 4 =
  27. 27.38 × 4 =
  28. 28.24 × 4 =
  29. 29.61 × 4 =
  30. 30.22 × 4 =
  31. 31.51 × 4 =
  32. 32.39 × 4 =
  33. 33.26 × 8 =
  34. 34.57 × 4 =
  35. 35.23 × 4 =
  36. 36.44 × 4 =
  37. 37.39 × 8 =
  38. 38.27 × 8 =
  39. 39.33 × 8 =
  40. 40.38 × 8 =

Answer key

  1. 280
  2. 152
  3. 184
  4. 112
  5. 80
  6. 124
  7. 104
  8. 268
  9. 68
  10. 256
  11. 240
  12. 176
  13. 132
  14. 172
  15. 96
  16. 144
  17. 280
  18. 144
  19. 284
  20. 84
  21. 252
  22. 180
  23. 112
  24. 240
  25. 200
  26. 120
  27. 152
  28. 96
  29. 244
  30. 88
  31. 204
  32. 156
  33. 208
  34. 228
  35. 92
  36. 176
  37. 312
  38. 216
  39. 264
  40. 304

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