← 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 278 · 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. 1.27 × 4 =
  2. 2.28 × 8 =
  3. 3.62 × 4 =
  4. 4.38 × 8 =
  5. 5.21 × 8 =
  6. 6.60 × 4 =
  7. 7.19 × 8 =
  8. 8.15 × 8 =
  9. 9.16 × 8 =
  10. 10.26 × 8 =
  11. 11.36 × 4 =
  12. 12.32 × 4 =
  13. 13.22 × 8 =
  14. 14.73 × 4 =
  15. 15.51 × 4 =
  16. 16.27 × 8 =
  17. 17.12 × 8 =
  18. 18.25 × 4 =
  19. 19.64 × 4 =
  20. 20.67 × 4 =
  21. 21.20 × 4 =
  22. 22.18 × 8 =
  23. 23.23 × 4 =
  24. 24.45 × 4 =
  25. 25.36 × 8 =
  26. 26.13 × 8 =
  27. 27.33 × 8 =
  28. 28.35 × 8 =
  29. 29.40 × 4 =
  30. 30.59 × 4 =
  31. 31.31 × 4 =
  32. 32.25 × 8 =
  33. 33.63 × 4 =
  34. 34.23 × 8 =
  35. 35.14 × 4 =
  36. 36.19 × 4 =
  37. 37.37 × 8 =
  38. 38.68 × 4 =
  39. 39.32 × 8 =
  40. 40.43 × 4 =

Answer key

  1. 108
  2. 224
  3. 248
  4. 304
  5. 168
  6. 240
  7. 152
  8. 120
  9. 128
  10. 208
  11. 144
  12. 128
  13. 176
  14. 292
  15. 204
  16. 216
  17. 96
  18. 100
  19. 256
  20. 268
  21. 80
  22. 144
  23. 92
  24. 180
  25. 288
  26. 104
  27. 264
  28. 280
  29. 160
  30. 236
  31. 124
  32. 200
  33. 252
  34. 184
  35. 56
  36. 76
  37. 296
  38. 272
  39. 256
  40. 172

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