← 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 288 · 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. 1.21 × 4 =
  2. 2.34 × 4 =
  3. 3.51 × 4 =
  4. 4.74 × 4 =
  5. 5.47 × 4 =
  6. 6.17 × 4 =
  7. 7.71 × 4 =
  8. 8.43 × 4 =
  9. 9.39 × 8 =
  10. 10.57 × 4 =
  11. 11.29 × 8 =
  12. 12.35 × 8 =
  13. 13.33 × 8 =
  14. 14.12 × 4 =
  15. 15.14 × 8 =
  16. 16.30 × 8 =
  17. 17.15 × 8 =
  18. 18.13 × 4 =
  19. 19.24 × 8 =
  20. 20.32 × 4 =
  21. 21.45 × 4 =
  22. 22.28 × 4 =
  23. 23.26 × 8 =
  24. 24.64 × 4 =
  25. 25.14 × 4 =
  26. 26.70 × 4 =
  27. 27.65 × 4 =
  28. 28.22 × 8 =
  29. 29.19 × 8 =
  30. 30.28 × 8 =
  31. 31.22 × 4 =
  32. 32.54 × 4 =
  33. 33.21 × 8 =
  34. 34.23 × 8 =
  35. 35.27 × 8 =
  36. 36.50 × 4 =
  37. 37.23 × 4 =
  38. 38.31 × 4 =
  39. 39.25 × 4 =
  40. 40.35 × 4 =

Answer key

  1. 84
  2. 136
  3. 204
  4. 296
  5. 188
  6. 68
  7. 284
  8. 172
  9. 312
  10. 228
  11. 232
  12. 280
  13. 264
  14. 48
  15. 112
  16. 240
  17. 120
  18. 52
  19. 192
  20. 128
  21. 180
  22. 112
  23. 208
  24. 256
  25. 56
  26. 280
  27. 260
  28. 176
  29. 152
  30. 224
  31. 88
  32. 216
  33. 168
  34. 184
  35. 216
  36. 200
  37. 92
  38. 124
  39. 100
  40. 140

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