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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 32 · 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. 1.48 × 4 =
  2. 2.36 × 4 =
  3. 3.15 × 8 =
  4. 4.20 × 4 =
  5. 5.14 × 8 =
  6. 6.30 × 8 =
  7. 7.45 × 4 =
  8. 8.36 × 8 =
  9. 9.26 × 8 =
  10. 10.75 × 4 =
  11. 11.26 × 4 =
  12. 12.27 × 8 =
  13. 13.25 × 4 =
  14. 14.19 × 8 =
  15. 15.52 × 4 =
  16. 16.32 × 8 =
  17. 17.13 × 4 =
  18. 18.38 × 8 =
  19. 19.64 × 4 =
  20. 20.54 × 4 =
  21. 21.18 × 8 =
  22. 22.43 × 4 =
  23. 23.13 × 8 =
  24. 24.28 × 4 =
  25. 25.23 × 8 =
  26. 26.22 × 8 =
  27. 27.55 × 4 =
  28. 28.58 × 4 =
  29. 29.38 × 4 =
  30. 30.23 × 4 =
  31. 31.24 × 8 =
  32. 32.57 × 4 =
  33. 33.32 × 4 =
  34. 34.27 × 4 =
  35. 35.25 × 8 =
  36. 36.40 × 8 =
  37. 37.33 × 8 =
  38. 38.12 × 8 =
  39. 39.19 × 4 =
  40. 40.70 × 4 =

Answer key

  1. 192
  2. 144
  3. 120
  4. 80
  5. 112
  6. 240
  7. 180
  8. 288
  9. 208
  10. 300
  11. 104
  12. 216
  13. 100
  14. 152
  15. 208
  16. 256
  17. 52
  18. 304
  19. 256
  20. 216
  21. 144
  22. 172
  23. 104
  24. 112
  25. 184
  26. 176
  27. 220
  28. 232
  29. 152
  30. 92
  31. 192
  32. 228
  33. 128
  34. 108
  35. 200
  36. 320
  37. 264
  38. 96
  39. 76
  40. 280

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