← 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 827 · 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. 1.34 × 8 =
  2. 2.25 × 8 =
  3. 3.14 × 8 =
  4. 4.70 × 4 =
  5. 5.30 × 8 =
  6. 6.72 × 4 =
  7. 7.17 × 4 =
  8. 8.13 × 4 =
  9. 9.28 × 8 =
  10. 10.66 × 4 =
  11. 11.67 × 4 =
  12. 12.35 × 8 =
  13. 13.68 × 4 =
  14. 14.65 × 4 =
  15. 15.71 × 4 =
  16. 16.33 × 8 =
  17. 17.28 × 4 =
  18. 18.47 × 4 =
  19. 19.45 × 4 =
  20. 20.15 × 8 =
  21. 21.22 × 4 =
  22. 22.37 × 4 =
  23. 23.59 × 4 =
  24. 24.20 × 4 =
  25. 25.20 × 8 =
  26. 26.32 × 8 =
  27. 27.23 × 8 =
  28. 28.60 × 4 =
  29. 29.33 × 4 =
  30. 30.73 × 4 =
  31. 31.38 × 8 =
  32. 32.35 × 4 =
  33. 33.43 × 4 =
  34. 34.36 × 4 =
  35. 35.41 × 4 =
  36. 36.38 × 4 =
  37. 37.30 × 4 =
  38. 38.13 × 8 =
  39. 39.50 × 4 =
  40. 40.21 × 4 =

Answer key

  1. 272
  2. 200
  3. 112
  4. 280
  5. 240
  6. 288
  7. 68
  8. 52
  9. 224
  10. 264
  11. 268
  12. 280
  13. 272
  14. 260
  15. 284
  16. 264
  17. 112
  18. 188
  19. 180
  20. 120
  21. 88
  22. 148
  23. 236
  24. 80
  25. 160
  26. 256
  27. 184
  28. 240
  29. 132
  30. 292
  31. 304
  32. 140
  33. 172
  34. 144
  35. 164
  36. 152
  37. 120
  38. 104
  39. 200
  40. 84

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