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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 886 · 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. 1.35 × 4 =
  2. 2.15 × 8 =
  3. 3.28 × 4 =
  4. 4.62 × 4 =
  5. 5.20 × 4 =
  6. 6.30 × 8 =
  7. 7.36 × 4 =
  8. 8.25 × 8 =
  9. 9.17 × 8 =
  10. 10.23 × 8 =
  11. 11.64 × 4 =
  12. 12.26 × 4 =
  13. 13.31 × 4 =
  14. 14.18 × 4 =
  15. 15.16 × 4 =
  16. 16.67 × 4 =
  17. 17.26 × 8 =
  18. 18.13 × 8 =
  19. 19.33 × 8 =
  20. 20.15 × 4 =
  21. 21.37 × 8 =
  22. 22.41 × 4 =
  23. 23.12 × 8 =
  24. 24.22 × 4 =
  25. 25.19 × 8 =
  26. 26.42 × 4 =
  27. 27.75 × 4 =
  28. 28.53 × 4 =
  29. 29.40 × 8 =
  30. 30.38 × 4 =
  31. 31.16 × 8 =
  32. 32.32 × 8 =
  33. 33.36 × 8 =
  34. 34.23 × 4 =
  35. 35.28 × 8 =
  36. 36.43 × 4 =
  37. 37.71 × 4 =
  38. 38.22 × 8 =
  39. 39.54 × 4 =
  40. 40.14 × 8 =

Answer key

  1. 140
  2. 120
  3. 112
  4. 248
  5. 80
  6. 240
  7. 144
  8. 200
  9. 136
  10. 184
  11. 256
  12. 104
  13. 124
  14. 72
  15. 64
  16. 268
  17. 208
  18. 104
  19. 264
  20. 60
  21. 296
  22. 164
  23. 96
  24. 88
  25. 152
  26. 168
  27. 300
  28. 212
  29. 320
  30. 152
  31. 128
  32. 256
  33. 288
  34. 92
  35. 224
  36. 172
  37. 284
  38. 176
  39. 216
  40. 112

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