← 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 123 · 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. 1.70 × 4 =
  2. 2.50 × 4 =
  3. 3.28 × 8 =
  4. 4.40 × 8 =
  5. 5.58 × 4 =
  6. 6.41 × 4 =
  7. 7.38 × 4 =
  8. 8.23 × 8 =
  9. 9.54 × 4 =
  10. 10.33 × 8 =
  11. 11.39 × 8 =
  12. 12.30 × 4 =
  13. 13.18 × 8 =
  14. 14.24 × 8 =
  15. 15.32 × 4 =
  16. 16.37 × 8 =
  17. 17.65 × 4 =
  18. 18.13 × 4 =
  19. 19.25 × 4 =
  20. 20.48 × 4 =
  21. 21.16 × 4 =
  22. 22.35 × 8 =
  23. 23.13 × 8 =
  24. 24.57 × 4 =
  25. 25.72 × 4 =
  26. 26.19 × 4 =
  27. 27.28 × 4 =
  28. 28.31 × 8 =
  29. 29.64 × 4 =
  30. 30.32 × 8 =
  31. 31.14 × 8 =
  32. 32.53 × 4 =
  33. 33.26 × 8 =
  34. 34.24 × 4 =
  35. 35.22 × 8 =
  36. 36.17 × 8 =
  37. 37.56 × 4 =
  38. 38.62 × 4 =
  39. 39.25 × 8 =
  40. 40.75 × 4 =

Answer key

  1. 280
  2. 200
  3. 224
  4. 320
  5. 232
  6. 164
  7. 152
  8. 184
  9. 216
  10. 264
  11. 312
  12. 120
  13. 144
  14. 192
  15. 128
  16. 296
  17. 260
  18. 52
  19. 100
  20. 192
  21. 64
  22. 280
  23. 104
  24. 228
  25. 288
  26. 76
  27. 112
  28. 248
  29. 256
  30. 256
  31. 112
  32. 212
  33. 208
  34. 96
  35. 176
  36. 136
  37. 224
  38. 248
  39. 200
  40. 300

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