← 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 765 · 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. 1.54 × 4 =
  2. 2.14 × 8 =
  3. 3.22 × 4 =
  4. 4.43 × 4 =
  5. 5.16 × 8 =
  6. 6.22 × 8 =
  7. 7.65 × 4 =
  8. 8.16 × 4 =
  9. 9.40 × 4 =
  10. 10.41 × 4 =
  11. 11.61 × 4 =
  12. 12.25 × 4 =
  13. 13.32 × 8 =
  14. 14.17 × 8 =
  15. 15.71 × 4 =
  16. 16.53 × 4 =
  17. 17.18 × 4 =
  18. 18.35 × 8 =
  19. 19.42 × 4 =
  20. 20.33 × 4 =
  21. 21.35 × 4 =
  22. 22.28 × 8 =
  23. 23.34 × 4 =
  24. 24.52 × 4 =
  25. 25.13 × 4 =
  26. 26.36 × 4 =
  27. 27.37 × 8 =
  28. 28.55 × 4 =
  29. 29.23 × 4 =
  30. 30.49 × 4 =
  31. 31.31 × 4 =
  32. 32.12 × 8 =
  33. 33.34 × 8 =
  34. 34.15 × 8 =
  35. 35.66 × 4 =
  36. 36.40 × 8 =
  37. 37.19 × 8 =
  38. 38.24 × 8 =
  39. 39.70 × 4 =
  40. 40.32 × 4 =

Answer key

  1. 216
  2. 112
  3. 88
  4. 172
  5. 128
  6. 176
  7. 260
  8. 64
  9. 160
  10. 164
  11. 244
  12. 100
  13. 256
  14. 136
  15. 284
  16. 212
  17. 72
  18. 280
  19. 168
  20. 132
  21. 140
  22. 224
  23. 136
  24. 208
  25. 52
  26. 144
  27. 296
  28. 220
  29. 92
  30. 196
  31. 124
  32. 96
  33. 272
  34. 120
  35. 264
  36. 320
  37. 152
  38. 192
  39. 280
  40. 128

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