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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 447 · 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. 1.46 × 4 =
  2. 2.64 × 4 =
  3. 3.48 × 4 =
  4. 4.36 × 8 =
  5. 5.29 × 4 =
  6. 6.33 × 8 =
  7. 7.23 × 8 =
  8. 8.22 × 4 =
  9. 9.35 × 8 =
  10. 10.37 × 8 =
  11. 11.39 × 8 =
  12. 12.51 × 4 =
  13. 13.34 × 8 =
  14. 14.25 × 8 =
  15. 15.41 × 4 =
  16. 16.58 × 4 =
  17. 17.18 × 4 =
  18. 18.12 × 8 =
  19. 19.66 × 4 =
  20. 20.32 × 8 =
  21. 21.30 × 8 =
  22. 22.29 × 8 =
  23. 23.32 × 4 =
  24. 24.43 × 4 =
  25. 25.33 × 4 =
  26. 26.65 × 4 =
  27. 27.13 × 4 =
  28. 28.61 × 4 =
  29. 29.12 × 4 =
  30. 30.40 × 4 =
  31. 31.19 × 4 =
  32. 32.22 × 8 =
  33. 33.53 × 4 =
  34. 34.21 × 8 =
  35. 35.42 × 4 =
  36. 36.27 × 8 =
  37. 37.28 × 4 =
  38. 38.14 × 8 =
  39. 39.13 × 8 =
  40. 40.20 × 8 =

Answer key

  1. 184
  2. 256
  3. 192
  4. 288
  5. 116
  6. 264
  7. 184
  8. 88
  9. 280
  10. 296
  11. 312
  12. 204
  13. 272
  14. 200
  15. 164
  16. 232
  17. 72
  18. 96
  19. 264
  20. 256
  21. 240
  22. 232
  23. 128
  24. 172
  25. 132
  26. 260
  27. 52
  28. 244
  29. 48
  30. 160
  31. 76
  32. 176
  33. 212
  34. 168
  35. 168
  36. 216
  37. 112
  38. 112
  39. 104
  40. 160

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