← 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 553 · 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. 2.17 × 4 =
  3. 3.25 × 8 =
  4. 4.60 × 4 =
  5. 5.38 × 8 =
  6. 6.69 × 4 =
  7. 7.32 × 8 =
  8. 8.37 × 8 =
  9. 9.29 × 4 =
  10. 10.65 × 4 =
  11. 11.45 × 4 =
  12. 12.28 × 4 =
  13. 13.46 × 4 =
  14. 14.35 × 8 =
  15. 15.58 × 4 =
  16. 16.67 × 4 =
  17. 17.12 × 8 =
  18. 18.18 × 8 =
  19. 19.26 × 4 =
  20. 20.14 × 8 =
  21. 21.36 × 4 =
  22. 22.31 × 4 =
  23. 23.19 × 8 =
  24. 24.33 × 8 =
  25. 25.20 × 8 =
  26. 26.44 × 4 =
  27. 27.14 × 4 =
  28. 28.15 × 8 =
  29. 29.19 × 4 =
  30. 30.23 × 4 =
  31. 31.66 × 4 =
  32. 32.13 × 8 =
  33. 33.21 × 8 =
  34. 34.20 × 4 =
  35. 35.75 × 4 =
  36. 36.71 × 4 =
  37. 37.39 × 4 =
  38. 38.40 × 8 =
  39. 39.51 × 4 =
  40. 40.54 × 4 =

Answer key

  1. 176
  2. 68
  3. 200
  4. 240
  5. 304
  6. 276
  7. 256
  8. 296
  9. 116
  10. 260
  11. 180
  12. 112
  13. 184
  14. 280
  15. 232
  16. 268
  17. 96
  18. 144
  19. 104
  20. 112
  21. 144
  22. 124
  23. 152
  24. 264
  25. 160
  26. 176
  27. 56
  28. 120
  29. 76
  30. 92
  31. 264
  32. 104
  33. 168
  34. 80
  35. 300
  36. 284
  37. 156
  38. 320
  39. 204
  40. 216

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