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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 745 · 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. 2.26 × 4 =
  3. 3.20 × 8 =
  4. 4.16 × 8 =
  5. 5.35 × 8 =
  6. 6.31 × 8 =
  7. 7.15 × 8 =
  8. 8.36 × 4 =
  9. 9.63 × 4 =
  10. 10.51 × 4 =
  11. 11.37 × 4 =
  12. 12.48 × 4 =
  13. 13.23 × 8 =
  14. 14.18 × 4 =
  15. 15.23 × 4 =
  16. 16.50 × 4 =
  17. 17.19 × 4 =
  18. 18.30 × 4 =
  19. 19.49 × 4 =
  20. 20.22 × 8 =
  21. 21.17 × 4 =
  22. 22.52 × 4 =
  23. 23.16 × 4 =
  24. 24.25 × 8 =
  25. 25.24 × 8 =
  26. 26.20 × 4 =
  27. 27.13 × 8 =
  28. 28.24 × 4 =
  29. 29.28 × 4 =
  30. 30.18 × 8 =
  31. 31.19 × 8 =
  32. 32.40 × 4 =
  33. 33.14 × 8 =
  34. 34.28 × 8 =
  35. 35.71 × 4 =
  36. 36.22 × 4 =
  37. 37.38 × 8 =
  38. 38.13 × 4 =
  39. 39.33 × 8 =
  40. 40.32 × 8 =

Answer key

  1. 296
  2. 104
  3. 160
  4. 128
  5. 280
  6. 248
  7. 120
  8. 144
  9. 252
  10. 204
  11. 148
  12. 192
  13. 184
  14. 72
  15. 92
  16. 200
  17. 76
  18. 120
  19. 196
  20. 176
  21. 68
  22. 208
  23. 64
  24. 200
  25. 192
  26. 80
  27. 104
  28. 96
  29. 112
  30. 144
  31. 152
  32. 160
  33. 112
  34. 224
  35. 284
  36. 88
  37. 304
  38. 52
  39. 264
  40. 256

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