← 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 143 · 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. 1.32 × 8 =
  2. 2.14 × 8 =
  3. 3.17 × 4 =
  4. 4.13 × 4 =
  5. 5.72 × 4 =
  6. 6.57 × 4 =
  7. 7.75 × 4 =
  8. 8.33 × 4 =
  9. 9.20 × 8 =
  10. 10.24 × 4 =
  11. 11.53 × 4 =
  12. 12.19 × 8 =
  13. 13.15 × 8 =
  14. 14.70 × 4 =
  15. 15.25 × 8 =
  16. 16.45 × 4 =
  17. 17.34 × 8 =
  18. 18.74 × 4 =
  19. 19.26 × 8 =
  20. 20.16 × 8 =
  21. 21.20 × 4 =
  22. 22.29 × 4 =
  23. 23.18 × 8 =
  24. 24.17 × 8 =
  25. 25.23 × 4 =
  26. 26.36 × 8 =
  27. 27.19 × 4 =
  28. 28.44 × 4 =
  29. 29.41 × 4 =
  30. 30.37 × 8 =
  31. 31.54 × 4 =
  32. 32.67 × 4 =
  33. 33.24 × 8 =
  34. 34.61 × 4 =
  35. 35.21 × 8 =
  36. 36.58 × 4 =
  37. 37.39 × 8 =
  38. 38.22 × 8 =
  39. 39.51 × 4 =
  40. 40.50 × 4 =

Answer key

  1. 256
  2. 112
  3. 68
  4. 52
  5. 288
  6. 228
  7. 300
  8. 132
  9. 160
  10. 96
  11. 212
  12. 152
  13. 120
  14. 280
  15. 200
  16. 180
  17. 272
  18. 296
  19. 208
  20. 128
  21. 80
  22. 116
  23. 144
  24. 136
  25. 92
  26. 288
  27. 76
  28. 176
  29. 164
  30. 296
  31. 216
  32. 268
  33. 192
  34. 244
  35. 168
  36. 232
  37. 312
  38. 176
  39. 204
  40. 200

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