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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 893 · 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. 1.22 × 4 =
  2. 2.60 × 4 =
  3. 3.20 × 8 =
  4. 4.73 × 4 =
  5. 5.61 × 4 =
  6. 6.30 × 8 =
  7. 7.25 × 8 =
  8. 8.15 × 8 =
  9. 9.22 × 8 =
  10. 10.18 × 8 =
  11. 11.66 × 4 =
  12. 12.40 × 8 =
  13. 13.29 × 4 =
  14. 14.58 × 4 =
  15. 15.30 × 4 =
  16. 16.13 × 4 =
  17. 17.17 × 8 =
  18. 18.24 × 8 =
  19. 19.40 × 4 =
  20. 20.50 × 4 =
  21. 21.21 × 4 =
  22. 22.32 × 4 =
  23. 23.35 × 8 =
  24. 24.14 × 8 =
  25. 25.16 × 8 =
  26. 26.28 × 4 =
  27. 27.19 × 8 =
  28. 28.36 × 8 =
  29. 29.14 × 4 =
  30. 30.13 × 8 =
  31. 31.37 × 4 =
  32. 32.33 × 4 =
  33. 33.42 × 4 =
  34. 34.23 × 8 =
  35. 35.34 × 8 =
  36. 36.38 × 8 =
  37. 37.31 × 4 =
  38. 38.12 × 8 =
  39. 39.39 × 8 =
  40. 40.27 × 4 =

Answer key

  1. 88
  2. 240
  3. 160
  4. 292
  5. 244
  6. 240
  7. 200
  8. 120
  9. 176
  10. 144
  11. 264
  12. 320
  13. 116
  14. 232
  15. 120
  16. 52
  17. 136
  18. 192
  19. 160
  20. 200
  21. 84
  22. 128
  23. 280
  24. 112
  25. 128
  26. 112
  27. 152
  28. 288
  29. 56
  30. 104
  31. 148
  32. 132
  33. 168
  34. 184
  35. 272
  36. 304
  37. 124
  38. 96
  39. 312
  40. 108

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