← 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 838 · 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. 1.26 × 8 =
  2. 2.31 × 8 =
  3. 3.36 × 8 =
  4. 4.37 × 4 =
  5. 5.12 × 8 =
  6. 6.24 × 4 =
  7. 7.33 × 8 =
  8. 8.46 × 4 =
  9. 9.13 × 8 =
  10. 10.39 × 8 =
  11. 11.37 × 8 =
  12. 12.28 × 4 =
  13. 13.15 × 8 =
  14. 14.16 × 4 =
  15. 15.30 × 8 =
  16. 16.57 × 4 =
  17. 17.23 × 8 =
  18. 18.45 × 4 =
  19. 19.44 × 4 =
  20. 20.21 × 8 =
  21. 21.59 × 4 =
  22. 22.24 × 8 =
  23. 23.47 × 4 =
  24. 24.61 × 4 =
  25. 25.40 × 4 =
  26. 26.42 × 4 =
  27. 27.54 × 4 =
  28. 28.68 × 4 =
  29. 29.43 × 4 =
  30. 30.66 × 4 =
  31. 31.32 × 4 =
  32. 32.27 × 4 =
  33. 33.69 × 4 =
  34. 34.22 × 4 =
  35. 35.74 × 4 =
  36. 36.50 × 4 =
  37. 37.64 × 4 =
  38. 38.35 × 8 =
  39. 39.20 × 8 =
  40. 40.41 × 4 =

Answer key

  1. 208
  2. 248
  3. 288
  4. 148
  5. 96
  6. 96
  7. 264
  8. 184
  9. 104
  10. 312
  11. 296
  12. 112
  13. 120
  14. 64
  15. 240
  16. 228
  17. 184
  18. 180
  19. 176
  20. 168
  21. 236
  22. 192
  23. 188
  24. 244
  25. 160
  26. 168
  27. 216
  28. 272
  29. 172
  30. 264
  31. 128
  32. 108
  33. 276
  34. 88
  35. 296
  36. 200
  37. 256
  38. 280
  39. 160
  40. 164

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