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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 190 · 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. 1.27 × 4 =
  2. 2.46 × 4 =
  3. 3.55 × 4 =
  4. 4.20 × 8 =
  5. 5.43 × 4 =
  6. 6.34 × 4 =
  7. 7.30 × 4 =
  8. 8.53 × 4 =
  9. 9.29 × 4 =
  10. 10.66 × 4 =
  11. 11.32 × 8 =
  12. 12.27 × 8 =
  13. 13.28 × 4 =
  14. 14.58 × 4 =
  15. 15.63 × 4 =
  16. 16.14 × 4 =
  17. 17.19 × 8 =
  18. 18.19 × 4 =
  19. 19.35 × 8 =
  20. 20.25 × 8 =
  21. 21.39 × 8 =
  22. 22.18 × 4 =
  23. 23.40 × 8 =
  24. 24.54 × 4 =
  25. 25.22 × 4 =
  26. 26.20 × 4 =
  27. 27.21 × 8 =
  28. 28.33 × 4 =
  29. 29.24 × 4 =
  30. 30.15 × 4 =
  31. 31.61 × 4 =
  32. 32.23 × 8 =
  33. 33.29 × 8 =
  34. 34.52 × 4 =
  35. 35.38 × 8 =
  36. 36.37 × 8 =
  37. 37.57 × 4 =
  38. 38.31 × 4 =
  39. 39.41 × 4 =
  40. 40.32 × 4 =

Answer key

  1. 108
  2. 184
  3. 220
  4. 160
  5. 172
  6. 136
  7. 120
  8. 212
  9. 116
  10. 264
  11. 256
  12. 216
  13. 112
  14. 232
  15. 252
  16. 56
  17. 152
  18. 76
  19. 280
  20. 200
  21. 312
  22. 72
  23. 320
  24. 216
  25. 88
  26. 80
  27. 168
  28. 132
  29. 96
  30. 60
  31. 244
  32. 184
  33. 232
  34. 208
  35. 304
  36. 296
  37. 228
  38. 124
  39. 164
  40. 128

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