← 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 305 · 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 × 4 =
  2. 2.72 × 4 =
  3. 3.25 × 4 =
  4. 4.34 × 4 =
  5. 5.51 × 4 =
  6. 6.14 × 8 =
  7. 7.34 × 8 =
  8. 8.35 × 8 =
  9. 9.64 × 4 =
  10. 10.12 × 8 =
  11. 11.23 × 8 =
  12. 12.19 × 8 =
  13. 13.21 × 8 =
  14. 14.37 × 8 =
  15. 15.25 × 8 =
  16. 16.26 × 4 =
  17. 17.24 × 4 =
  18. 18.48 × 4 =
  19. 19.29 × 4 =
  20. 20.18 × 4 =
  21. 21.44 × 4 =
  22. 22.22 × 8 =
  23. 23.36 × 8 =
  24. 24.37 × 4 =
  25. 25.27 × 4 =
  26. 26.71 × 4 =
  27. 27.61 × 4 =
  28. 28.58 × 4 =
  29. 29.36 × 4 =
  30. 30.16 × 8 =
  31. 31.47 × 4 =
  32. 32.54 × 4 =
  33. 33.32 × 4 =
  34. 34.35 × 4 =
  35. 35.33 × 8 =
  36. 36.31 × 8 =
  37. 37.65 × 4 =
  38. 38.55 × 4 =
  39. 39.24 × 8 =
  40. 40.52 × 4 =

Answer key

  1. 88
  2. 288
  3. 100
  4. 136
  5. 204
  6. 112
  7. 272
  8. 280
  9. 256
  10. 96
  11. 184
  12. 152
  13. 168
  14. 296
  15. 200
  16. 104
  17. 96
  18. 192
  19. 116
  20. 72
  21. 176
  22. 176
  23. 288
  24. 148
  25. 108
  26. 284
  27. 244
  28. 232
  29. 144
  30. 128
  31. 188
  32. 216
  33. 128
  34. 140
  35. 264
  36. 248
  37. 260
  38. 220
  39. 192
  40. 208

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