← 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 401 · 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. 1.40 × 8 =
  2. 2.26 × 4 =
  3. 3.52 × 4 =
  4. 4.14 × 8 =
  5. 5.63 × 4 =
  6. 6.47 × 4 =
  7. 7.30 × 8 =
  8. 8.62 × 4 =
  9. 9.12 × 4 =
  10. 10.28 × 8 =
  11. 11.34 × 4 =
  12. 12.15 × 8 =
  13. 13.19 × 8 =
  14. 14.41 × 4 =
  15. 15.59 × 4 =
  16. 16.39 × 8 =
  17. 17.17 × 8 =
  18. 18.28 × 4 =
  19. 19.35 × 8 =
  20. 20.33 × 4 =
  21. 21.51 × 4 =
  22. 22.72 × 4 =
  23. 23.23 × 8 =
  24. 24.50 × 4 =
  25. 25.31 × 8 =
  26. 26.12 × 8 =
  27. 27.24 × 8 =
  28. 28.71 × 4 =
  29. 29.27 × 4 =
  30. 30.21 × 8 =
  31. 31.57 × 4 =
  32. 32.19 × 4 =
  33. 33.55 × 4 =
  34. 34.15 × 4 =
  35. 35.24 × 4 =
  36. 36.13 × 4 =
  37. 37.33 × 8 =
  38. 38.17 × 4 =
  39. 39.65 × 4 =
  40. 40.25 × 8 =

Answer key

  1. 320
  2. 104
  3. 208
  4. 112
  5. 252
  6. 188
  7. 240
  8. 248
  9. 48
  10. 224
  11. 136
  12. 120
  13. 152
  14. 164
  15. 236
  16. 312
  17. 136
  18. 112
  19. 280
  20. 132
  21. 204
  22. 288
  23. 184
  24. 200
  25. 248
  26. 96
  27. 192
  28. 284
  29. 108
  30. 168
  31. 228
  32. 76
  33. 220
  34. 60
  35. 96
  36. 52
  37. 264
  38. 68
  39. 260
  40. 200

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