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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 140 · 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. 1.16 × 4 =
  2. 2.29 × 8 =
  3. 3.19 × 8 =
  4. 4.18 × 4 =
  5. 5.44 × 4 =
  6. 6.49 × 4 =
  7. 7.29 × 4 =
  8. 8.60 × 4 =
  9. 9.45 × 4 =
  10. 10.62 × 4 =
  11. 11.28 × 4 =
  12. 12.30 × 4 =
  13. 13.21 × 4 =
  14. 14.37 × 4 =
  15. 15.63 × 4 =
  16. 16.22 × 8 =
  17. 17.22 × 4 =
  18. 18.13 × 4 =
  19. 19.32 × 8 =
  20. 20.26 × 8 =
  21. 21.70 × 4 =
  22. 22.40 × 8 =
  23. 23.13 × 8 =
  24. 24.16 × 8 =
  25. 25.54 × 4 =
  26. 26.23 × 4 =
  27. 27.39 × 8 =
  28. 28.33 × 8 =
  29. 29.18 × 8 =
  30. 30.35 × 4 =
  31. 31.20 × 4 =
  32. 32.12 × 8 =
  33. 33.36 × 8 =
  34. 34.21 × 8 =
  35. 35.35 × 8 =
  36. 36.32 × 4 =
  37. 37.19 × 4 =
  38. 38.73 × 4 =
  39. 39.51 × 4 =
  40. 40.38 × 4 =

Answer key

  1. 64
  2. 232
  3. 152
  4. 72
  5. 176
  6. 196
  7. 116
  8. 240
  9. 180
  10. 248
  11. 112
  12. 120
  13. 84
  14. 148
  15. 252
  16. 176
  17. 88
  18. 52
  19. 256
  20. 208
  21. 280
  22. 320
  23. 104
  24. 128
  25. 216
  26. 92
  27. 312
  28. 264
  29. 144
  30. 140
  31. 80
  32. 96
  33. 288
  34. 168
  35. 280
  36. 128
  37. 76
  38. 292
  39. 204
  40. 152

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