← 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 502 · 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. 1.42 × 4 =
  2. 2.19 × 4 =
  3. 3.28 × 8 =
  4. 4.38 × 8 =
  5. 5.36 × 8 =
  6. 6.68 × 4 =
  7. 7.60 × 4 =
  8. 8.27 × 8 =
  9. 9.19 × 8 =
  10. 10.30 × 8 =
  11. 11.49 × 4 =
  12. 12.26 × 4 =
  13. 13.45 × 4 =
  14. 14.71 × 4 =
  15. 15.28 × 4 =
  16. 16.44 × 4 =
  17. 17.57 × 4 =
  18. 18.47 × 4 =
  19. 19.16 × 4 =
  20. 20.12 × 8 =
  21. 21.59 × 4 =
  22. 22.32 × 8 =
  23. 23.22 × 4 =
  24. 24.12 × 4 =
  25. 25.17 × 4 =
  26. 26.37 × 4 =
  27. 27.27 × 4 =
  28. 28.29 × 8 =
  29. 29.25 × 4 =
  30. 30.35 × 8 =
  31. 31.22 × 8 =
  32. 32.56 × 4 =
  33. 33.67 × 4 =
  34. 34.39 × 8 =
  35. 35.18 × 8 =
  36. 36.24 × 4 =
  37. 37.55 × 4 =
  38. 38.48 × 4 =
  39. 39.14 × 8 =
  40. 40.21 × 4 =

Answer key

  1. 168
  2. 76
  3. 224
  4. 304
  5. 288
  6. 272
  7. 240
  8. 216
  9. 152
  10. 240
  11. 196
  12. 104
  13. 180
  14. 284
  15. 112
  16. 176
  17. 228
  18. 188
  19. 64
  20. 96
  21. 236
  22. 256
  23. 88
  24. 48
  25. 68
  26. 148
  27. 108
  28. 232
  29. 100
  30. 280
  31. 176
  32. 224
  33. 268
  34. 312
  35. 144
  36. 96
  37. 220
  38. 192
  39. 112
  40. 84

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