← 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 906 · 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. 1.34 × 8 =
  2. 2.15 × 8 =
  3. 3.26 × 4 =
  4. 4.16 × 4 =
  5. 5.19 × 4 =
  6. 6.40 × 8 =
  7. 7.20 × 4 =
  8. 8.35 × 8 =
  9. 9.29 × 4 =
  10. 10.37 × 8 =
  11. 11.20 × 8 =
  12. 12.34 × 4 =
  13. 13.27 × 8 =
  14. 14.54 × 4 =
  15. 15.42 × 4 =
  16. 16.22 × 8 =
  17. 17.13 × 4 =
  18. 18.51 × 4 =
  19. 19.12 × 8 =
  20. 20.60 × 4 =
  21. 21.38 × 4 =
  22. 22.45 × 4 =
  23. 23.31 × 4 =
  24. 24.29 × 8 =
  25. 25.50 × 4 =
  26. 26.72 × 4 =
  27. 27.24 × 4 =
  28. 28.43 × 4 =
  29. 29.26 × 8 =
  30. 30.28 × 4 =
  31. 31.33 × 4 =
  32. 32.33 × 8 =
  33. 33.39 × 8 =
  34. 34.13 × 8 =
  35. 35.32 × 8 =
  36. 36.17 × 4 =
  37. 37.28 × 8 =
  38. 38.30 × 8 =
  39. 39.49 × 4 =
  40. 40.75 × 4 =

Answer key

  1. 272
  2. 120
  3. 104
  4. 64
  5. 76
  6. 320
  7. 80
  8. 280
  9. 116
  10. 296
  11. 160
  12. 136
  13. 216
  14. 216
  15. 168
  16. 176
  17. 52
  18. 204
  19. 96
  20. 240
  21. 152
  22. 180
  23. 124
  24. 232
  25. 200
  26. 288
  27. 96
  28. 172
  29. 208
  30. 112
  31. 132
  32. 264
  33. 312
  34. 104
  35. 256
  36. 68
  37. 224
  38. 240
  39. 196
  40. 300

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