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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 364 · 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. 1.24 × 4 =
  2. 2.27 × 4 =
  3. 3.52 × 4 =
  4. 4.32 × 8 =
  5. 5.34 × 4 =
  6. 6.29 × 8 =
  7. 7.26 × 4 =
  8. 8.15 × 8 =
  9. 9.58 × 4 =
  10. 10.65 × 4 =
  11. 11.27 × 8 =
  12. 12.13 × 4 =
  13. 13.17 × 8 =
  14. 14.16 × 8 =
  15. 15.23 × 8 =
  16. 16.22 × 4 =
  17. 17.41 × 4 =
  18. 18.62 × 4 =
  19. 19.69 × 4 =
  20. 20.18 × 8 =
  21. 21.33 × 8 =
  22. 22.22 × 8 =
  23. 23.14 × 4 =
  24. 24.25 × 4 =
  25. 25.21 × 8 =
  26. 26.45 × 4 =
  27. 27.19 × 8 =
  28. 28.72 × 4 =
  29. 29.16 × 4 =
  30. 30.12 × 4 =
  31. 31.13 × 8 =
  32. 32.73 × 4 =
  33. 33.17 × 4 =
  34. 34.38 × 8 =
  35. 35.18 × 4 =
  36. 36.20 × 4 =
  37. 37.53 × 4 =
  38. 38.54 × 4 =
  39. 39.14 × 8 =
  40. 40.25 × 8 =

Answer key

  1. 96
  2. 108
  3. 208
  4. 256
  5. 136
  6. 232
  7. 104
  8. 120
  9. 232
  10. 260
  11. 216
  12. 52
  13. 136
  14. 128
  15. 184
  16. 88
  17. 164
  18. 248
  19. 276
  20. 144
  21. 264
  22. 176
  23. 56
  24. 100
  25. 168
  26. 180
  27. 152
  28. 288
  29. 64
  30. 48
  31. 104
  32. 292
  33. 68
  34. 304
  35. 72
  36. 80
  37. 212
  38. 216
  39. 112
  40. 200

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