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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 90 · 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. 1.26 × 8 =
  2. 2.17 × 4 =
  3. 3.21 × 8 =
  4. 4.29 × 4 =
  5. 5.34 × 8 =
  6. 6.47 × 4 =
  7. 7.37 × 8 =
  8. 8.19 × 4 =
  9. 9.33 × 4 =
  10. 10.61 × 4 =
  11. 11.56 × 4 =
  12. 12.38 × 8 =
  13. 13.62 × 4 =
  14. 14.27 × 4 =
  15. 15.40 × 8 =
  16. 16.13 × 4 =
  17. 17.12 × 4 =
  18. 18.51 × 4 =
  19. 19.75 × 4 =
  20. 20.70 × 4 =
  21. 21.44 × 4 =
  22. 22.72 × 4 =
  23. 23.38 × 4 =
  24. 24.28 × 8 =
  25. 25.22 × 8 =
  26. 26.12 × 8 =
  27. 27.33 × 8 =
  28. 28.20 × 4 =
  29. 29.14 × 8 =
  30. 30.36 × 4 =
  31. 31.31 × 4 =
  32. 32.24 × 4 =
  33. 33.23 × 8 =
  34. 34.37 × 4 =
  35. 35.18 × 8 =
  36. 36.30 × 8 =
  37. 37.65 × 4 =
  38. 38.40 × 4 =
  39. 39.68 × 4 =
  40. 40.64 × 4 =

Answer key

  1. 208
  2. 68
  3. 168
  4. 116
  5. 272
  6. 188
  7. 296
  8. 76
  9. 132
  10. 244
  11. 224
  12. 304
  13. 248
  14. 108
  15. 320
  16. 52
  17. 48
  18. 204
  19. 300
  20. 280
  21. 176
  22. 288
  23. 152
  24. 224
  25. 176
  26. 96
  27. 264
  28. 80
  29. 112
  30. 144
  31. 124
  32. 96
  33. 184
  34. 148
  35. 144
  36. 240
  37. 260
  38. 160
  39. 272
  40. 256

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