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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 935 · 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. 2.60 × 4 =
  3. 3.26 × 8 =
  4. 4.31 × 8 =
  5. 5.19 × 4 =
  6. 6.28 × 4 =
  7. 7.36 × 8 =
  8. 8.28 × 8 =
  9. 9.20 × 8 =
  10. 10.25 × 8 =
  11. 11.29 × 4 =
  12. 12.22 × 4 =
  13. 13.16 × 8 =
  14. 14.40 × 4 =
  15. 15.32 × 8 =
  16. 16.53 × 4 =
  17. 17.32 × 4 =
  18. 18.50 × 4 =
  19. 19.26 × 4 =
  20. 20.62 × 4 =
  21. 21.12 × 8 =
  22. 22.15 × 8 =
  23. 23.33 × 8 =
  24. 24.74 × 4 =
  25. 25.37 × 8 =
  26. 26.72 × 4 =
  27. 27.66 × 4 =
  28. 28.39 × 8 =
  29. 29.45 × 4 =
  30. 30.54 × 4 =
  31. 31.38 × 4 =
  32. 32.35 × 8 =
  33. 33.70 × 4 =
  34. 34.17 × 8 =
  35. 35.14 × 8 =
  36. 36.30 × 4 =
  37. 37.24 × 8 =
  38. 38.58 × 4 =
  39. 39.38 × 8 =
  40. 40.25 × 4 =

Answer key

  1. 72
  2. 240
  3. 208
  4. 248
  5. 76
  6. 112
  7. 288
  8. 224
  9. 160
  10. 200
  11. 116
  12. 88
  13. 128
  14. 160
  15. 256
  16. 212
  17. 128
  18. 200
  19. 104
  20. 248
  21. 96
  22. 120
  23. 264
  24. 296
  25. 296
  26. 288
  27. 264
  28. 312
  29. 180
  30. 216
  31. 152
  32. 280
  33. 280
  34. 136
  35. 112
  36. 120
  37. 192
  38. 232
  39. 304
  40. 100

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