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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 874 · 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 × 8 =
  2. 2.32 × 4 =
  3. 3.39 × 8 =
  4. 4.36 × 8 =
  5. 5.21 × 8 =
  6. 6.14 × 8 =
  7. 7.18 × 8 =
  8. 8.20 × 8 =
  9. 9.64 × 4 =
  10. 10.23 × 4 =
  11. 11.13 × 4 =
  12. 12.34 × 4 =
  13. 13.15 × 8 =
  14. 14.25 × 4 =
  15. 15.26 × 4 =
  16. 16.16 × 8 =
  17. 17.40 × 8 =
  18. 18.35 × 4 =
  19. 19.39 × 4 =
  20. 20.12 × 4 =
  21. 21.36 × 4 =
  22. 22.29 × 8 =
  23. 23.20 × 4 =
  24. 24.25 × 8 =
  25. 25.28 × 8 =
  26. 26.73 × 4 =
  27. 27.37 × 8 =
  28. 28.22 × 8 =
  29. 29.26 × 8 =
  30. 30.45 × 4 =
  31. 31.38 × 4 =
  32. 32.22 × 4 =
  33. 33.66 × 4 =
  34. 34.49 × 4 =
  35. 35.24 × 8 =
  36. 36.37 × 4 =
  37. 37.27 × 8 =
  38. 38.31 × 8 =
  39. 39.56 × 4 =
  40. 40.30 × 4 =

Answer key

  1. 280
  2. 128
  3. 312
  4. 288
  5. 168
  6. 112
  7. 144
  8. 160
  9. 256
  10. 92
  11. 52
  12. 136
  13. 120
  14. 100
  15. 104
  16. 128
  17. 320
  18. 140
  19. 156
  20. 48
  21. 144
  22. 232
  23. 80
  24. 200
  25. 224
  26. 292
  27. 296
  28. 176
  29. 208
  30. 180
  31. 152
  32. 88
  33. 264
  34. 196
  35. 192
  36. 148
  37. 216
  38. 248
  39. 224
  40. 120

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