← 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 554 · 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. 1.67 × 4 =
  2. 2.35 × 4 =
  3. 3.32 × 8 =
  4. 4.49 × 4 =
  5. 5.28 × 4 =
  6. 6.24 × 8 =
  7. 7.35 × 8 =
  8. 8.52 × 4 =
  9. 9.60 × 4 =
  10. 10.37 × 4 =
  11. 11.19 × 8 =
  12. 12.38 × 8 =
  13. 13.28 × 8 =
  14. 14.21 × 8 =
  15. 15.29 × 4 =
  16. 16.34 × 4 =
  17. 17.66 × 4 =
  18. 18.17 × 4 =
  19. 19.15 × 8 =
  20. 20.12 × 4 =
  21. 21.32 × 4 =
  22. 22.26 × 8 =
  23. 23.17 × 8 =
  24. 24.27 × 8 =
  25. 25.30 × 8 =
  26. 26.55 × 4 =
  27. 27.18 × 4 =
  28. 28.33 × 4 =
  29. 29.57 × 4 =
  30. 30.33 × 8 =
  31. 31.75 × 4 =
  32. 32.31 × 8 =
  33. 33.36 × 4 =
  34. 34.20 × 4 =
  35. 35.19 × 4 =
  36. 36.29 × 8 =
  37. 37.14 × 8 =
  38. 38.58 × 4 =
  39. 39.50 × 4 =
  40. 40.25 × 4 =

Answer key

  1. 268
  2. 140
  3. 256
  4. 196
  5. 112
  6. 192
  7. 280
  8. 208
  9. 240
  10. 148
  11. 152
  12. 304
  13. 224
  14. 168
  15. 116
  16. 136
  17. 264
  18. 68
  19. 120
  20. 48
  21. 128
  22. 208
  23. 136
  24. 216
  25. 240
  26. 220
  27. 72
  28. 132
  29. 228
  30. 264
  31. 300
  32. 248
  33. 144
  34. 80
  35. 76
  36. 232
  37. 112
  38. 232
  39. 200
  40. 100

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