← 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 80 · 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. 1.14 × 8 =
  2. 2.20 × 8 =
  3. 3.21 × 4 =
  4. 4.39 × 8 =
  5. 5.69 × 4 =
  6. 6.19 × 8 =
  7. 7.21 × 8 =
  8. 8.22 × 4 =
  9. 9.13 × 8 =
  10. 10.26 × 8 =
  11. 11.65 × 4 =
  12. 12.25 × 4 =
  13. 13.48 × 4 =
  14. 14.22 × 8 =
  15. 15.17 × 4 =
  16. 16.68 × 4 =
  17. 17.30 × 4 =
  18. 18.49 × 4 =
  19. 19.15 × 8 =
  20. 20.35 × 8 =
  21. 21.35 × 4 =
  22. 22.36 × 8 =
  23. 23.38 × 8 =
  24. 24.44 × 4 =
  25. 25.55 × 4 =
  26. 26.51 × 4 =
  27. 27.45 × 4 =
  28. 28.43 × 4 =
  29. 29.63 × 4 =
  30. 30.52 × 4 =
  31. 31.70 × 4 =
  32. 32.46 × 4 =
  33. 33.12 × 8 =
  34. 34.24 × 4 =
  35. 35.50 × 4 =
  36. 36.12 × 4 =
  37. 37.40 × 8 =
  38. 38.39 × 4 =
  39. 39.59 × 4 =
  40. 40.47 × 4 =

Answer key

  1. 112
  2. 160
  3. 84
  4. 312
  5. 276
  6. 152
  7. 168
  8. 88
  9. 104
  10. 208
  11. 260
  12. 100
  13. 192
  14. 176
  15. 68
  16. 272
  17. 120
  18. 196
  19. 120
  20. 280
  21. 140
  22. 288
  23. 304
  24. 176
  25. 220
  26. 204
  27. 180
  28. 172
  29. 252
  30. 208
  31. 280
  32. 184
  33. 96
  34. 96
  35. 200
  36. 48
  37. 320
  38. 156
  39. 236
  40. 188

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