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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 135 · 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. 1.37 × 8 =
  2. 2.36 × 8 =
  3. 3.33 × 8 =
  4. 4.17 × 8 =
  5. 5.47 × 4 =
  6. 6.21 × 8 =
  7. 7.16 × 8 =
  8. 8.26 × 4 =
  9. 9.31 × 4 =
  10. 10.32 × 8 =
  11. 11.48 × 4 =
  12. 12.42 × 4 =
  13. 13.28 × 4 =
  14. 14.39 × 4 =
  15. 15.15 × 4 =
  16. 16.38 × 8 =
  17. 17.29 × 8 =
  18. 18.40 × 4 =
  19. 19.12 × 8 =
  20. 20.24 × 4 =
  21. 21.39 × 8 =
  22. 22.37 × 4 =
  23. 23.35 × 8 =
  24. 24.72 × 4 =
  25. 25.29 × 4 =
  26. 26.55 × 4 =
  27. 27.25 × 8 =
  28. 28.22 × 8 =
  29. 29.19 × 4 =
  30. 30.26 × 8 =
  31. 31.15 × 8 =
  32. 32.38 × 4 =
  33. 33.14 × 8 =
  34. 34.22 × 4 =
  35. 35.33 × 4 =
  36. 36.13 × 8 =
  37. 37.45 × 4 =
  38. 38.73 × 4 =
  39. 39.12 × 4 =
  40. 40.57 × 4 =

Answer key

  1. 296
  2. 288
  3. 264
  4. 136
  5. 188
  6. 168
  7. 128
  8. 104
  9. 124
  10. 256
  11. 192
  12. 168
  13. 112
  14. 156
  15. 60
  16. 304
  17. 232
  18. 160
  19. 96
  20. 96
  21. 312
  22. 148
  23. 280
  24. 288
  25. 116
  26. 220
  27. 200
  28. 176
  29. 76
  30. 208
  31. 120
  32. 152
  33. 112
  34. 88
  35. 132
  36. 104
  37. 180
  38. 292
  39. 48
  40. 228

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