← 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 676 · 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. 1.35 × 8 =
  2. 2.26 × 8 =
  3. 3.22 × 4 =
  4. 4.34 × 4 =
  5. 5.14 × 8 =
  6. 6.62 × 4 =
  7. 7.39 × 4 =
  8. 8.66 × 4 =
  9. 9.25 × 4 =
  10. 10.56 × 4 =
  11. 11.72 × 4 =
  12. 12.16 × 4 =
  13. 13.46 × 4 =
  14. 14.24 × 8 =
  15. 15.30 × 4 =
  16. 16.38 × 4 =
  17. 17.38 × 8 =
  18. 18.17 × 8 =
  19. 19.68 × 4 =
  20. 20.24 × 4 =
  21. 21.32 × 8 =
  22. 22.19 × 4 =
  23. 23.33 × 8 =
  24. 24.18 × 8 =
  25. 25.60 × 4 =
  26. 26.22 × 8 =
  27. 27.29 × 8 =
  28. 28.27 × 8 =
  29. 29.21 × 8 =
  30. 30.16 × 8 =
  31. 31.13 × 4 =
  32. 32.23 × 8 =
  33. 33.32 × 4 =
  34. 34.23 × 4 =
  35. 35.37 × 4 =
  36. 36.30 × 8 =
  37. 37.40 × 4 =
  38. 38.59 × 4 =
  39. 39.31 × 8 =
  40. 40.21 × 4 =

Answer key

  1. 280
  2. 208
  3. 88
  4. 136
  5. 112
  6. 248
  7. 156
  8. 264
  9. 100
  10. 224
  11. 288
  12. 64
  13. 184
  14. 192
  15. 120
  16. 152
  17. 304
  18. 136
  19. 272
  20. 96
  21. 256
  22. 76
  23. 264
  24. 144
  25. 240
  26. 176
  27. 232
  28. 216
  29. 168
  30. 128
  31. 52
  32. 184
  33. 128
  34. 92
  35. 148
  36. 240
  37. 160
  38. 236
  39. 248
  40. 84

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