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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 908 · 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. 1.18 × 4 =
  2. 2.73 × 4 =
  3. 3.16 × 8 =
  4. 4.31 × 8 =
  5. 5.26 × 8 =
  6. 6.12 × 8 =
  7. 7.19 × 8 =
  8. 8.14 × 8 =
  9. 9.62 × 4 =
  10. 10.15 × 4 =
  11. 11.29 × 4 =
  12. 12.36 × 8 =
  13. 13.34 × 8 =
  14. 14.45 × 4 =
  15. 15.30 × 8 =
  16. 16.40 × 8 =
  17. 17.27 × 8 =
  18. 18.33 × 4 =
  19. 19.75 × 4 =
  20. 20.12 × 4 =
  21. 21.29 × 8 =
  22. 22.15 × 8 =
  23. 23.24 × 8 =
  24. 24.17 × 4 =
  25. 25.28 × 4 =
  26. 26.13 × 4 =
  27. 27.71 × 4 =
  28. 28.18 × 8 =
  29. 29.21 × 8 =
  30. 30.21 × 4 =
  31. 31.64 × 4 =
  32. 32.68 × 4 =
  33. 33.20 × 8 =
  34. 34.33 × 8 =
  35. 35.37 × 4 =
  36. 36.32 × 8 =
  37. 37.74 × 4 =
  38. 38.22 × 4 =
  39. 39.23 × 8 =
  40. 40.16 × 4 =

Answer key

  1. 72
  2. 292
  3. 128
  4. 248
  5. 208
  6. 96
  7. 152
  8. 112
  9. 248
  10. 60
  11. 116
  12. 288
  13. 272
  14. 180
  15. 240
  16. 320
  17. 216
  18. 132
  19. 300
  20. 48
  21. 232
  22. 120
  23. 192
  24. 68
  25. 112
  26. 52
  27. 284
  28. 144
  29. 168
  30. 84
  31. 256
  32. 272
  33. 160
  34. 264
  35. 148
  36. 256
  37. 296
  38. 88
  39. 184
  40. 64

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