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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 361 · 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. 1.25 × 8 =
  2. 2.14 × 8 =
  3. 3.47 × 4 =
  4. 4.28 × 8 =
  5. 5.66 × 4 =
  6. 6.48 × 4 =
  7. 7.75 × 4 =
  8. 8.12 × 4 =
  9. 9.13 × 4 =
  10. 10.51 × 4 =
  11. 11.12 × 8 =
  12. 12.63 × 4 =
  13. 13.20 × 4 =
  14. 14.22 × 8 =
  15. 15.16 × 8 =
  16. 16.21 × 8 =
  17. 17.32 × 4 =
  18. 18.61 × 4 =
  19. 19.17 × 8 =
  20. 20.23 × 8 =
  21. 21.35 × 4 =
  22. 22.15 × 4 =
  23. 23.69 × 4 =
  24. 24.31 × 4 =
  25. 25.39 × 8 =
  26. 26.36 × 8 =
  27. 27.44 × 4 =
  28. 28.45 × 4 =
  29. 29.21 × 4 =
  30. 30.19 × 8 =
  31. 31.55 × 4 =
  32. 32.58 × 4 =
  33. 33.24 × 4 =
  34. 34.52 × 4 =
  35. 35.33 × 8 =
  36. 36.49 × 4 =
  37. 37.15 × 8 =
  38. 38.32 × 8 =
  39. 39.34 × 8 =
  40. 40.50 × 4 =

Answer key

  1. 200
  2. 112
  3. 188
  4. 224
  5. 264
  6. 192
  7. 300
  8. 48
  9. 52
  10. 204
  11. 96
  12. 252
  13. 80
  14. 176
  15. 128
  16. 168
  17. 128
  18. 244
  19. 136
  20. 184
  21. 140
  22. 60
  23. 276
  24. 124
  25. 312
  26. 288
  27. 176
  28. 180
  29. 84
  30. 152
  31. 220
  32. 232
  33. 96
  34. 208
  35. 264
  36. 196
  37. 120
  38. 256
  39. 272
  40. 200

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