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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 835 · 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 × 8 =
  2. 2.19 × 8 =
  3. 3.73 × 4 =
  4. 4.41 × 4 =
  5. 5.19 × 4 =
  6. 6.21 × 8 =
  7. 7.23 × 4 =
  8. 8.18 × 8 =
  9. 9.15 × 4 =
  10. 10.32 × 8 =
  11. 11.69 × 4 =
  12. 12.16 × 8 =
  13. 13.33 × 4 =
  14. 14.29 × 4 =
  15. 15.47 × 4 =
  16. 16.34 × 4 =
  17. 17.34 × 8 =
  18. 18.37 × 8 =
  19. 19.28 × 4 =
  20. 20.26 × 4 =
  21. 21.15 × 8 =
  22. 22.16 × 4 =
  23. 23.20 × 8 =
  24. 24.68 × 4 =
  25. 25.27 × 4 =
  26. 26.22 × 4 =
  27. 27.23 × 8 =
  28. 28.32 × 4 =
  29. 29.12 × 4 =
  30. 30.64 × 4 =
  31. 31.38 × 8 =
  32. 32.40 × 8 =
  33. 33.17 × 8 =
  34. 34.21 × 4 =
  35. 35.24 × 8 =
  36. 36.14 × 8 =
  37. 37.72 × 4 =
  38. 38.67 × 4 =
  39. 39.37 × 4 =
  40. 40.70 × 4 =

Answer key

  1. 96
  2. 152
  3. 292
  4. 164
  5. 76
  6. 168
  7. 92
  8. 144
  9. 60
  10. 256
  11. 276
  12. 128
  13. 132
  14. 116
  15. 188
  16. 136
  17. 272
  18. 296
  19. 112
  20. 104
  21. 120
  22. 64
  23. 160
  24. 272
  25. 108
  26. 88
  27. 184
  28. 128
  29. 48
  30. 256
  31. 304
  32. 320
  33. 136
  34. 84
  35. 192
  36. 112
  37. 288
  38. 268
  39. 148
  40. 280

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