← 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 469 · 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. 1.57 × 4 =
  2. 2.39 × 8 =
  3. 3.33 × 8 =
  4. 4.14 × 8 =
  5. 5.36 × 4 =
  6. 6.53 × 4 =
  7. 7.19 × 8 =
  8. 8.26 × 8 =
  9. 9.32 × 8 =
  10. 10.13 × 8 =
  11. 11.33 × 4 =
  12. 12.61 × 4 =
  13. 13.60 × 4 =
  14. 14.16 × 4 =
  15. 15.72 × 4 =
  16. 16.63 × 4 =
  17. 17.39 × 4 =
  18. 18.56 × 4 =
  19. 19.15 × 4 =
  20. 20.37 × 4 =
  21. 21.54 × 4 =
  22. 22.23 × 8 =
  23. 23.35 × 4 =
  24. 24.42 × 4 =
  25. 25.30 × 8 =
  26. 26.75 × 4 =
  27. 27.24 × 4 =
  28. 28.34 × 8 =
  29. 29.21 × 8 =
  30. 30.40 × 8 =
  31. 31.12 × 8 =
  32. 32.29 × 4 =
  33. 33.28 × 8 =
  34. 34.37 × 8 =
  35. 35.22 × 8 =
  36. 36.17 × 4 =
  37. 37.71 × 4 =
  38. 38.23 × 4 =
  39. 39.48 × 4 =
  40. 40.24 × 8 =

Answer key

  1. 228
  2. 312
  3. 264
  4. 112
  5. 144
  6. 212
  7. 152
  8. 208
  9. 256
  10. 104
  11. 132
  12. 244
  13. 240
  14. 64
  15. 288
  16. 252
  17. 156
  18. 224
  19. 60
  20. 148
  21. 216
  22. 184
  23. 140
  24. 168
  25. 240
  26. 300
  27. 96
  28. 272
  29. 168
  30. 320
  31. 96
  32. 116
  33. 224
  34. 296
  35. 176
  36. 68
  37. 284
  38. 92
  39. 192
  40. 192

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