← 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 41 · 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. 1.23 × 4 =
  2. 2.31 × 4 =
  3. 3.12 × 8 =
  4. 4.39 × 4 =
  5. 5.18 × 4 =
  6. 6.25 × 4 =
  7. 7.20 × 4 =
  8. 8.67 × 4 =
  9. 9.26 × 4 =
  10. 10.42 × 4 =
  11. 11.19 × 4 =
  12. 12.16 × 8 =
  13. 13.33 × 4 =
  14. 14.29 × 4 =
  15. 15.32 × 4 =
  16. 16.61 × 4 =
  17. 17.69 × 4 =
  18. 18.40 × 8 =
  19. 19.16 × 4 =
  20. 20.19 × 8 =
  21. 21.65 × 4 =
  22. 22.59 × 4 =
  23. 23.17 × 4 =
  24. 24.45 × 4 =
  25. 25.15 × 8 =
  26. 26.43 × 4 =
  27. 27.22 × 4 =
  28. 28.13 × 8 =
  29. 29.49 × 4 =
  30. 30.70 × 4 =
  31. 31.35 × 4 =
  32. 32.36 × 8 =
  33. 33.37 × 8 =
  34. 34.18 × 8 =
  35. 35.26 × 8 =
  36. 36.38 × 8 =
  37. 37.71 × 4 =
  38. 38.14 × 4 =
  39. 39.27 × 8 =
  40. 40.55 × 4 =

Answer key

  1. 92
  2. 124
  3. 96
  4. 156
  5. 72
  6. 100
  7. 80
  8. 268
  9. 104
  10. 168
  11. 76
  12. 128
  13. 132
  14. 116
  15. 128
  16. 244
  17. 276
  18. 320
  19. 64
  20. 152
  21. 260
  22. 236
  23. 68
  24. 180
  25. 120
  26. 172
  27. 88
  28. 104
  29. 196
  30. 280
  31. 140
  32. 288
  33. 296
  34. 144
  35. 208
  36. 304
  37. 284
  38. 56
  39. 216
  40. 220

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