← 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 220 · 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. 1.24 × 8 =
  2. 2.20 × 8 =
  3. 3.17 × 8 =
  4. 4.27 × 8 =
  5. 5.15 × 8 =
  6. 6.14 × 8 =
  7. 7.54 × 4 =
  8. 8.37 × 8 =
  9. 9.34 × 8 =
  10. 10.21 × 8 =
  11. 11.16 × 8 =
  12. 12.35 × 4 =
  13. 13.62 × 4 =
  14. 14.28 × 4 =
  15. 15.33 × 8 =
  16. 16.34 × 4 =
  17. 17.31 × 4 =
  18. 18.60 × 4 =
  19. 19.19 × 8 =
  20. 20.40 × 8 =
  21. 21.15 × 4 =
  22. 22.38 × 4 =
  23. 23.47 × 4 =
  24. 24.23 × 8 =
  25. 25.57 × 4 =
  26. 26.14 × 4 =
  27. 27.56 × 4 =
  28. 28.12 × 4 =
  29. 29.42 × 4 =
  30. 30.18 × 8 =
  31. 31.40 × 4 =
  32. 32.13 × 8 =
  33. 33.45 × 4 =
  34. 34.22 × 4 =
  35. 35.72 × 4 =
  36. 36.28 × 8 =
  37. 37.38 × 8 =
  38. 38.30 × 8 =
  39. 39.24 × 4 =
  40. 40.67 × 4 =

Answer key

  1. 192
  2. 160
  3. 136
  4. 216
  5. 120
  6. 112
  7. 216
  8. 296
  9. 272
  10. 168
  11. 128
  12. 140
  13. 248
  14. 112
  15. 264
  16. 136
  17. 124
  18. 240
  19. 152
  20. 320
  21. 60
  22. 152
  23. 188
  24. 184
  25. 228
  26. 56
  27. 224
  28. 48
  29. 168
  30. 144
  31. 160
  32. 104
  33. 180
  34. 88
  35. 288
  36. 224
  37. 304
  38. 240
  39. 96
  40. 268

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