← 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 883 · 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 × 8 =
  2. 2.29 × 8 =
  3. 3.19 × 4 =
  4. 4.30 × 8 =
  5. 5.43 × 4 =
  6. 6.31 × 4 =
  7. 7.37 × 8 =
  8. 8.17 × 8 =
  9. 9.25 × 8 =
  10. 10.14 × 8 =
  11. 11.20 × 8 =
  12. 12.25 × 4 =
  13. 13.35 × 8 =
  14. 14.32 × 4 =
  15. 15.23 × 4 =
  16. 16.70 × 4 =
  17. 17.22 × 4 =
  18. 18.39 × 4 =
  19. 19.65 × 4 =
  20. 20.33 × 4 =
  21. 21.67 × 4 =
  22. 22.26 × 8 =
  23. 23.35 × 4 =
  24. 24.40 × 8 =
  25. 25.42 × 4 =
  26. 26.26 × 4 =
  27. 27.36 × 8 =
  28. 28.41 × 4 =
  29. 29.30 × 4 =
  30. 30.40 × 4 =
  31. 31.32 × 8 =
  32. 32.13 × 8 =
  33. 33.71 × 4 =
  34. 34.14 × 4 =
  35. 35.27 × 8 =
  36. 36.20 × 4 =
  37. 37.39 × 8 =
  38. 38.61 × 4 =
  39. 39.15 × 4 =
  40. 40.62 × 4 =

Answer key

  1. 176
  2. 232
  3. 76
  4. 240
  5. 172
  6. 124
  7. 296
  8. 136
  9. 200
  10. 112
  11. 160
  12. 100
  13. 280
  14. 128
  15. 92
  16. 280
  17. 88
  18. 156
  19. 260
  20. 132
  21. 268
  22. 208
  23. 140
  24. 320
  25. 168
  26. 104
  27. 288
  28. 164
  29. 120
  30. 160
  31. 256
  32. 104
  33. 284
  34. 56
  35. 216
  36. 80
  37. 312
  38. 244
  39. 60
  40. 248

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