← 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 537 · 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. 1.30 × 4 =
  2. 2.20 × 8 =
  3. 3.72 × 4 =
  4. 4.33 × 4 =
  5. 5.21 × 8 =
  6. 6.33 × 8 =
  7. 7.60 × 4 =
  8. 8.36 × 8 =
  9. 9.22 × 8 =
  10. 10.34 × 8 =
  11. 11.51 × 4 =
  12. 12.61 × 4 =
  13. 13.25 × 8 =
  14. 14.32 × 8 =
  15. 15.52 × 4 =
  16. 16.35 × 4 =
  17. 17.35 × 8 =
  18. 18.39 × 8 =
  19. 19.24 × 4 =
  20. 20.17 × 8 =
  21. 21.12 × 4 =
  22. 22.71 × 4 =
  23. 23.21 × 4 =
  24. 24.32 × 4 =
  25. 25.19 × 8 =
  26. 26.36 × 4 =
  27. 27.70 × 4 =
  28. 28.22 × 4 =
  29. 29.42 × 4 =
  30. 30.58 × 4 =
  31. 31.74 × 4 =
  32. 32.28 × 4 =
  33. 33.12 × 8 =
  34. 34.31 × 8 =
  35. 35.26 × 4 =
  36. 36.67 × 4 =
  37. 37.14 × 4 =
  38. 38.48 × 4 =
  39. 39.54 × 4 =
  40. 40.69 × 4 =

Answer key

  1. 120
  2. 160
  3. 288
  4. 132
  5. 168
  6. 264
  7. 240
  8. 288
  9. 176
  10. 272
  11. 204
  12. 244
  13. 200
  14. 256
  15. 208
  16. 140
  17. 280
  18. 312
  19. 96
  20. 136
  21. 48
  22. 284
  23. 84
  24. 128
  25. 152
  26. 144
  27. 280
  28. 88
  29. 168
  30. 232
  31. 296
  32. 112
  33. 96
  34. 248
  35. 104
  36. 268
  37. 56
  38. 192
  39. 216
  40. 276

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