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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 905 · 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. 1.53 × 4 =
  2. 2.12 × 8 =
  3. 3.22 × 4 =
  4. 4.26 × 4 =
  5. 5.39 × 4 =
  6. 6.43 × 4 =
  7. 7.70 × 4 =
  8. 8.21 × 4 =
  9. 9.28 × 8 =
  10. 10.45 × 4 =
  11. 11.52 × 4 =
  12. 12.33 × 8 =
  13. 13.26 × 8 =
  14. 14.20 × 8 =
  15. 15.24 × 8 =
  16. 16.35 × 8 =
  17. 17.21 × 8 =
  18. 18.37 × 8 =
  19. 19.16 × 8 =
  20. 20.12 × 4 =
  21. 21.29 × 8 =
  22. 22.47 × 4 =
  23. 23.23 × 4 =
  24. 24.14 × 4 =
  25. 25.60 × 4 =
  26. 26.18 × 4 =
  27. 27.35 × 4 =
  28. 28.51 × 4 =
  29. 29.13 × 8 =
  30. 30.68 × 4 =
  31. 31.46 × 4 =
  32. 32.13 × 4 =
  33. 33.17 × 8 =
  34. 34.39 × 8 =
  35. 35.42 × 4 =
  36. 36.33 × 4 =
  37. 37.38 × 4 =
  38. 38.61 × 4 =
  39. 39.28 × 4 =
  40. 40.40 × 4 =

Answer key

  1. 212
  2. 96
  3. 88
  4. 104
  5. 156
  6. 172
  7. 280
  8. 84
  9. 224
  10. 180
  11. 208
  12. 264
  13. 208
  14. 160
  15. 192
  16. 280
  17. 168
  18. 296
  19. 128
  20. 48
  21. 232
  22. 188
  23. 92
  24. 56
  25. 240
  26. 72
  27. 140
  28. 204
  29. 104
  30. 272
  31. 184
  32. 52
  33. 136
  34. 312
  35. 168
  36. 132
  37. 152
  38. 244
  39. 112
  40. 160

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