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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 903 · 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. 1.70 × 4 =
  2. 2.18 × 8 =
  3. 3.28 × 8 =
  4. 4.35 × 4 =
  5. 5.29 × 8 =
  6. 6.45 × 4 =
  7. 7.28 × 4 =
  8. 8.53 × 4 =
  9. 9.17 × 4 =
  10. 10.62 × 4 =
  11. 11.44 × 4 =
  12. 12.71 × 4 =
  13. 13.75 × 4 =
  14. 14.14 × 4 =
  15. 15.34 × 4 =
  16. 16.16 × 8 =
  17. 17.39 × 8 =
  18. 18.35 × 8 =
  19. 19.13 × 4 =
  20. 20.72 × 4 =
  21. 21.26 × 8 =
  22. 22.23 × 8 =
  23. 23.14 × 8 =
  24. 24.51 × 4 =
  25. 25.34 × 8 =
  26. 26.12 × 8 =
  27. 27.32 × 8 =
  28. 28.40 × 8 =
  29. 29.38 × 8 =
  30. 30.37 × 8 =
  31. 31.30 × 4 =
  32. 32.20 × 4 =
  33. 33.55 × 4 =
  34. 34.52 × 4 =
  35. 35.17 × 8 =
  36. 36.21 × 8 =
  37. 37.22 × 4 =
  38. 38.24 × 8 =
  39. 39.19 × 4 =
  40. 40.47 × 4 =

Answer key

  1. 280
  2. 144
  3. 224
  4. 140
  5. 232
  6. 180
  7. 112
  8. 212
  9. 68
  10. 248
  11. 176
  12. 284
  13. 300
  14. 56
  15. 136
  16. 128
  17. 312
  18. 280
  19. 52
  20. 288
  21. 208
  22. 184
  23. 112
  24. 204
  25. 272
  26. 96
  27. 256
  28. 320
  29. 304
  30. 296
  31. 120
  32. 80
  33. 220
  34. 208
  35. 136
  36. 168
  37. 88
  38. 192
  39. 76
  40. 188

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