← 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 89 · 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. 1.55 × 4 =
  2. 2.44 × 4 =
  3. 3.36 × 8 =
  4. 4.27 × 4 =
  5. 5.18 × 8 =
  6. 6.22 × 8 =
  7. 7.32 × 4 =
  8. 8.51 × 4 =
  9. 9.23 × 8 =
  10. 10.20 × 8 =
  11. 11.17 × 8 =
  12. 12.71 × 4 =
  13. 13.18 × 4 =
  14. 14.58 × 4 =
  15. 15.28 × 8 =
  16. 16.34 × 8 =
  17. 17.14 × 4 =
  18. 18.49 × 4 =
  19. 19.25 × 4 =
  20. 20.56 × 4 =
  21. 21.35 × 8 =
  22. 22.38 × 8 =
  23. 23.62 × 4 =
  24. 24.19 × 4 =
  25. 25.37 × 8 =
  26. 26.14 × 8 =
  27. 27.74 × 4 =
  28. 28.19 × 8 =
  29. 29.24 × 8 =
  30. 30.29 × 4 =
  31. 31.25 × 8 =
  32. 32.46 × 4 =
  33. 33.27 × 8 =
  34. 34.29 × 8 =
  35. 35.33 × 8 =
  36. 36.35 × 4 =
  37. 37.28 × 4 =
  38. 38.57 × 4 =
  39. 39.34 × 4 =
  40. 40.63 × 4 =

Answer key

  1. 220
  2. 176
  3. 288
  4. 108
  5. 144
  6. 176
  7. 128
  8. 204
  9. 184
  10. 160
  11. 136
  12. 284
  13. 72
  14. 232
  15. 224
  16. 272
  17. 56
  18. 196
  19. 100
  20. 224
  21. 280
  22. 304
  23. 248
  24. 76
  25. 296
  26. 112
  27. 296
  28. 152
  29. 192
  30. 116
  31. 200
  32. 184
  33. 216
  34. 232
  35. 264
  36. 140
  37. 112
  38. 228
  39. 136
  40. 252

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