← 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 412 · 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. 1.24 × 8 =
  2. 2.32 × 8 =
  3. 3.67 × 4 =
  4. 4.24 × 4 =
  5. 5.63 × 4 =
  6. 6.53 × 4 =
  7. 7.21 × 4 =
  8. 8.23 × 8 =
  9. 9.42 × 4 =
  10. 10.71 × 4 =
  11. 11.72 × 4 =
  12. 12.61 × 4 =
  13. 13.58 × 4 =
  14. 14.35 × 8 =
  15. 15.27 × 8 =
  16. 16.20 × 8 =
  17. 17.18 × 4 =
  18. 18.21 × 8 =
  19. 19.33 × 8 =
  20. 20.48 × 4 =
  21. 21.30 × 8 =
  22. 22.55 × 4 =
  23. 23.18 × 8 =
  24. 24.19 × 8 =
  25. 25.40 × 8 =
  26. 26.27 × 4 =
  27. 27.49 × 4 =
  28. 28.39 × 8 =
  29. 29.25 × 4 =
  30. 30.35 × 4 =
  31. 31.34 × 8 =
  32. 32.17 × 8 =
  33. 33.66 × 4 =
  34. 34.15 × 4 =
  35. 35.33 × 4 =
  36. 36.57 × 4 =
  37. 37.38 × 4 =
  38. 38.32 × 4 =
  39. 39.12 × 8 =
  40. 40.13 × 8 =

Answer key

  1. 192
  2. 256
  3. 268
  4. 96
  5. 252
  6. 212
  7. 84
  8. 184
  9. 168
  10. 284
  11. 288
  12. 244
  13. 232
  14. 280
  15. 216
  16. 160
  17. 72
  18. 168
  19. 264
  20. 192
  21. 240
  22. 220
  23. 144
  24. 152
  25. 320
  26. 108
  27. 196
  28. 312
  29. 100
  30. 140
  31. 272
  32. 136
  33. 264
  34. 60
  35. 132
  36. 228
  37. 152
  38. 128
  39. 96
  40. 104

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