← 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 809 · 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. 2.17 × 8 =
  3. 3.20 × 8 =
  4. 4.19 × 4 =
  5. 5.30 × 4 =
  6. 6.73 × 4 =
  7. 7.16 × 8 =
  8. 8.65 × 4 =
  9. 9.35 × 4 =
  10. 10.13 × 4 =
  11. 11.37 × 4 =
  12. 12.14 × 4 =
  13. 13.33 × 4 =
  14. 14.36 × 4 =
  15. 15.39 × 8 =
  16. 16.36 × 8 =
  17. 17.29 × 4 =
  18. 18.38 × 4 =
  19. 19.19 × 8 =
  20. 20.15 × 8 =
  21. 21.14 × 8 =
  22. 22.35 × 8 =
  23. 23.12 × 8 =
  24. 24.59 × 4 =
  25. 25.29 × 8 =
  26. 26.17 × 4 =
  27. 27.64 × 4 =
  28. 28.32 × 8 =
  29. 29.13 × 8 =
  30. 30.72 × 4 =
  31. 31.44 × 4 =
  32. 32.32 × 4 =
  33. 33.24 × 8 =
  34. 34.25 × 8 =
  35. 35.69 × 4 =
  36. 36.23 × 8 =
  37. 37.47 × 4 =
  38. 38.68 × 4 =
  39. 39.33 × 8 =
  40. 40.40 × 8 =

Answer key

  1. 272
  2. 136
  3. 160
  4. 76
  5. 120
  6. 292
  7. 128
  8. 260
  9. 140
  10. 52
  11. 148
  12. 56
  13. 132
  14. 144
  15. 312
  16. 288
  17. 116
  18. 152
  19. 152
  20. 120
  21. 112
  22. 280
  23. 96
  24. 236
  25. 232
  26. 68
  27. 256
  28. 256
  29. 104
  30. 288
  31. 176
  32. 128
  33. 192
  34. 200
  35. 276
  36. 184
  37. 188
  38. 272
  39. 264
  40. 320

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