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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 461 · 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. 1.20 × 4 =
  2. 2.57 × 4 =
  3. 3.26 × 8 =
  4. 4.18 × 8 =
  5. 5.15 × 8 =
  6. 6.63 × 4 =
  7. 7.61 × 4 =
  8. 8.12 × 8 =
  9. 9.28 × 4 =
  10. 10.14 × 8 =
  11. 11.25 × 8 =
  12. 12.41 × 4 =
  13. 13.40 × 8 =
  14. 14.54 × 4 =
  15. 15.26 × 4 =
  16. 16.44 × 4 =
  17. 17.30 × 8 =
  18. 18.39 × 4 =
  19. 19.38 × 8 =
  20. 20.24 × 8 =
  21. 21.29 × 8 =
  22. 22.31 × 8 =
  23. 23.65 × 4 =
  24. 24.32 × 4 =
  25. 25.64 × 4 =
  26. 26.25 × 4 =
  27. 27.20 × 8 =
  28. 28.13 × 8 =
  29. 29.15 × 4 =
  30. 30.33 × 4 =
  31. 31.28 × 8 =
  32. 32.22 × 8 =
  33. 33.18 × 4 =
  34. 34.58 × 4 =
  35. 35.17 × 4 =
  36. 36.32 × 8 =
  37. 37.33 × 8 =
  38. 38.46 × 4 =
  39. 39.71 × 4 =
  40. 40.16 × 4 =

Answer key

  1. 80
  2. 228
  3. 208
  4. 144
  5. 120
  6. 252
  7. 244
  8. 96
  9. 112
  10. 112
  11. 200
  12. 164
  13. 320
  14. 216
  15. 104
  16. 176
  17. 240
  18. 156
  19. 304
  20. 192
  21. 232
  22. 248
  23. 260
  24. 128
  25. 256
  26. 100
  27. 160
  28. 104
  29. 60
  30. 132
  31. 224
  32. 176
  33. 72
  34. 232
  35. 68
  36. 256
  37. 264
  38. 184
  39. 284
  40. 64

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