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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 926 · 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 × 4 =
  2. 2.40 × 8 =
  3. 3.26 × 8 =
  4. 4.46 × 4 =
  5. 5.43 × 4 =
  6. 6.75 × 4 =
  7. 7.15 × 4 =
  8. 8.24 × 4 =
  9. 9.60 × 4 =
  10. 10.20 × 4 =
  11. 11.16 × 4 =
  12. 12.25 × 8 =
  13. 13.14 × 8 =
  14. 14.29 × 8 =
  15. 15.68 × 4 =
  16. 16.34 × 8 =
  17. 17.61 × 4 =
  18. 18.30 × 8 =
  19. 19.14 × 4 =
  20. 20.38 × 8 =
  21. 21.28 × 8 =
  22. 22.66 × 4 =
  23. 23.21 × 8 =
  24. 24.16 × 8 =
  25. 25.32 × 4 =
  26. 26.17 × 4 =
  27. 27.29 × 4 =
  28. 28.39 × 8 =
  29. 29.31 × 4 =
  30. 30.55 × 4 =
  31. 31.22 × 8 =
  32. 32.50 × 4 =
  33. 33.19 × 8 =
  34. 34.12 × 8 =
  35. 35.17 × 8 =
  36. 36.39 × 4 =
  37. 37.37 × 8 =
  38. 38.48 × 4 =
  39. 39.35 × 4 =
  40. 40.32 × 8 =

Answer key

  1. 76
  2. 320
  3. 208
  4. 184
  5. 172
  6. 300
  7. 60
  8. 96
  9. 240
  10. 80
  11. 64
  12. 200
  13. 112
  14. 232
  15. 272
  16. 272
  17. 244
  18. 240
  19. 56
  20. 304
  21. 224
  22. 264
  23. 168
  24. 128
  25. 128
  26. 68
  27. 116
  28. 312
  29. 124
  30. 220
  31. 176
  32. 200
  33. 152
  34. 96
  35. 136
  36. 156
  37. 296
  38. 192
  39. 140
  40. 256

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