← 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 31 · 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. 1.22 × 4 =
  2. 2.26 × 4 =
  3. 3.35 × 4 =
  4. 4.20 × 8 =
  5. 5.28 × 8 =
  6. 6.12 × 8 =
  7. 7.43 × 4 =
  8. 8.33 × 8 =
  9. 9.39 × 8 =
  10. 10.25 × 4 =
  11. 11.22 × 8 =
  12. 12.59 × 4 =
  13. 13.37 × 8 =
  14. 14.23 × 4 =
  15. 15.18 × 8 =
  16. 16.51 × 4 =
  17. 17.35 × 8 =
  18. 18.18 × 4 =
  19. 19.75 × 4 =
  20. 20.36 × 4 =
  21. 21.15 × 4 =
  22. 22.16 × 8 =
  23. 23.41 × 4 =
  24. 24.73 × 4 =
  25. 25.16 × 4 =
  26. 26.15 × 8 =
  27. 27.26 × 8 =
  28. 28.31 × 4 =
  29. 29.17 × 8 =
  30. 30.19 × 8 =
  31. 31.65 × 4 =
  32. 32.28 × 4 =
  33. 33.44 × 4 =
  34. 34.58 × 4 =
  35. 35.12 × 4 =
  36. 36.14 × 8 =
  37. 37.40 × 8 =
  38. 38.20 × 4 =
  39. 39.23 × 8 =
  40. 40.71 × 4 =

Answer key

  1. 88
  2. 104
  3. 140
  4. 160
  5. 224
  6. 96
  7. 172
  8. 264
  9. 312
  10. 100
  11. 176
  12. 236
  13. 296
  14. 92
  15. 144
  16. 204
  17. 280
  18. 72
  19. 300
  20. 144
  21. 60
  22. 128
  23. 164
  24. 292
  25. 64
  26. 120
  27. 208
  28. 124
  29. 136
  30. 152
  31. 260
  32. 112
  33. 176
  34. 232
  35. 48
  36. 112
  37. 320
  38. 80
  39. 184
  40. 284

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