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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 959 · 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. 1.42 × 4 =
  2. 2.38 × 4 =
  3. 3.24 × 8 =
  4. 4.13 × 4 =
  5. 5.36 × 8 =
  6. 6.60 × 4 =
  7. 7.15 × 4 =
  8. 8.31 × 8 =
  9. 9.52 × 4 =
  10. 10.29 × 8 =
  11. 11.55 × 4 =
  12. 12.21 × 8 =
  13. 13.25 × 8 =
  14. 14.65 × 4 =
  15. 15.14 × 4 =
  16. 16.37 × 4 =
  17. 17.13 × 8 =
  18. 18.28 × 8 =
  19. 19.27 × 8 =
  20. 20.12 × 8 =
  21. 21.19 × 8 =
  22. 22.30 × 4 =
  23. 23.20 × 4 =
  24. 24.18 × 8 =
  25. 25.34 × 8 =
  26. 26.39 × 8 =
  27. 27.16 × 8 =
  28. 28.46 × 4 =
  29. 29.22 × 4 =
  30. 30.33 × 8 =
  31. 31.35 × 4 =
  32. 32.38 × 8 =
  33. 33.17 × 8 =
  34. 34.16 × 4 =
  35. 35.27 × 4 =
  36. 36.17 × 4 =
  37. 37.14 × 8 =
  38. 38.15 × 8 =
  39. 39.31 × 4 =
  40. 40.12 × 4 =

Answer key

  1. 168
  2. 152
  3. 192
  4. 52
  5. 288
  6. 240
  7. 60
  8. 248
  9. 208
  10. 232
  11. 220
  12. 168
  13. 200
  14. 260
  15. 56
  16. 148
  17. 104
  18. 224
  19. 216
  20. 96
  21. 152
  22. 120
  23. 80
  24. 144
  25. 272
  26. 312
  27. 128
  28. 184
  29. 88
  30. 264
  31. 140
  32. 304
  33. 136
  34. 64
  35. 108
  36. 68
  37. 112
  38. 120
  39. 124
  40. 48

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