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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 989 · 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. 1.19 × 8 =
  2. 2.66 × 4 =
  3. 3.18 × 4 =
  4. 4.61 × 4 =
  5. 5.30 × 8 =
  6. 6.15 × 8 =
  7. 7.25 × 8 =
  8. 8.18 × 8 =
  9. 9.33 × 8 =
  10. 10.40 × 8 =
  11. 11.33 × 4 =
  12. 12.34 × 8 =
  13. 13.19 × 4 =
  14. 14.26 × 8 =
  15. 15.25 × 4 =
  16. 16.32 × 8 =
  17. 17.28 × 4 =
  18. 18.40 × 4 =
  19. 19.14 × 8 =
  20. 20.13 × 8 =
  21. 21.20 × 8 =
  22. 22.27 × 4 =
  23. 23.37 × 4 =
  24. 24.62 × 4 =
  25. 25.36 × 8 =
  26. 26.35 × 8 =
  27. 27.35 × 4 =
  28. 28.37 × 8 =
  29. 29.12 × 8 =
  30. 30.12 × 4 =
  31. 31.22 × 8 =
  32. 32.21 × 8 =
  33. 33.44 × 4 =
  34. 34.17 × 8 =
  35. 35.17 × 4 =
  36. 36.22 × 4 =
  37. 37.45 × 4 =
  38. 38.29 × 8 =
  39. 39.50 × 4 =
  40. 40.69 × 4 =

Answer key

  1. 152
  2. 264
  3. 72
  4. 244
  5. 240
  6. 120
  7. 200
  8. 144
  9. 264
  10. 320
  11. 132
  12. 272
  13. 76
  14. 208
  15. 100
  16. 256
  17. 112
  18. 160
  19. 112
  20. 104
  21. 160
  22. 108
  23. 148
  24. 248
  25. 288
  26. 280
  27. 140
  28. 296
  29. 96
  30. 48
  31. 176
  32. 168
  33. 176
  34. 136
  35. 68
  36. 88
  37. 180
  38. 232
  39. 200
  40. 276

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