← 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 486 · 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. 1.25 × 8 =
  2. 2.19 × 4 =
  3. 3.31 × 8 =
  4. 4.18 × 4 =
  5. 5.70 × 4 =
  6. 6.19 × 8 =
  7. 7.67 × 4 =
  8. 8.61 × 4 =
  9. 9.36 × 8 =
  10. 10.22 × 4 =
  11. 11.56 × 4 =
  12. 12.66 × 4 =
  13. 13.38 × 4 =
  14. 14.23 × 4 =
  15. 15.15 × 8 =
  16. 16.16 × 8 =
  17. 17.21 × 8 =
  18. 18.29 × 8 =
  19. 19.31 × 4 =
  20. 20.40 × 8 =
  21. 21.17 × 4 =
  22. 22.24 × 8 =
  23. 23.17 × 8 =
  24. 24.28 × 4 =
  25. 25.34 × 4 =
  26. 26.26 × 8 =
  27. 27.15 × 4 =
  28. 28.28 × 8 =
  29. 29.22 × 8 =
  30. 30.53 × 4 =
  31. 31.48 × 4 =
  32. 32.36 × 4 =
  33. 33.39 × 8 =
  34. 34.27 × 8 =
  35. 35.20 × 4 =
  36. 36.37 × 8 =
  37. 37.65 × 4 =
  38. 38.75 × 4 =
  39. 39.21 × 4 =
  40. 40.42 × 4 =

Answer key

  1. 200
  2. 76
  3. 248
  4. 72
  5. 280
  6. 152
  7. 268
  8. 244
  9. 288
  10. 88
  11. 224
  12. 264
  13. 152
  14. 92
  15. 120
  16. 128
  17. 168
  18. 232
  19. 124
  20. 320
  21. 68
  22. 192
  23. 136
  24. 112
  25. 136
  26. 208
  27. 60
  28. 224
  29. 176
  30. 212
  31. 192
  32. 144
  33. 312
  34. 216
  35. 80
  36. 296
  37. 260
  38. 300
  39. 84
  40. 168

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