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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 210 · 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. 1.12 × 4 =
  2. 2.19 × 8 =
  3. 3.24 × 8 =
  4. 4.15 × 4 =
  5. 5.51 × 4 =
  6. 6.30 × 8 =
  7. 7.32 × 4 =
  8. 8.32 × 8 =
  9. 9.16 × 8 =
  10. 10.25 × 4 =
  11. 11.26 × 4 =
  12. 12.29 × 8 =
  13. 13.67 × 4 =
  14. 14.31 × 8 =
  15. 15.24 × 4 =
  16. 16.17 × 8 =
  17. 17.23 × 4 =
  18. 18.57 × 4 =
  19. 19.34 × 4 =
  20. 20.72 × 4 =
  21. 21.64 × 4 =
  22. 22.15 × 8 =
  23. 23.13 × 4 =
  24. 24.66 × 4 =
  25. 25.30 × 4 =
  26. 26.22 × 4 =
  27. 27.12 × 8 =
  28. 28.65 × 4 =
  29. 29.40 × 4 =
  30. 30.19 × 4 =
  31. 31.63 × 4 =
  32. 32.40 × 8 =
  33. 33.35 × 8 =
  34. 34.42 × 4 =
  35. 35.34 × 8 =
  36. 36.50 × 4 =
  37. 37.27 × 8 =
  38. 38.25 × 8 =
  39. 39.62 × 4 =
  40. 40.39 × 4 =

Answer key

  1. 48
  2. 152
  3. 192
  4. 60
  5. 204
  6. 240
  7. 128
  8. 256
  9. 128
  10. 100
  11. 104
  12. 232
  13. 268
  14. 248
  15. 96
  16. 136
  17. 92
  18. 228
  19. 136
  20. 288
  21. 256
  22. 120
  23. 52
  24. 264
  25. 120
  26. 88
  27. 96
  28. 260
  29. 160
  30. 76
  31. 252
  32. 320
  33. 280
  34. 168
  35. 272
  36. 200
  37. 216
  38. 200
  39. 248
  40. 156

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