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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 889 · 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. 1.14 × 8 =
  2. 2.17 × 8 =
  3. 3.38 × 4 =
  4. 4.38 × 8 =
  5. 5.23 × 4 =
  6. 6.49 × 4 =
  7. 7.37 × 8 =
  8. 8.31 × 4 =
  9. 9.45 × 4 =
  10. 10.62 × 4 =
  11. 11.13 × 8 =
  12. 12.19 × 8 =
  13. 13.25 × 8 =
  14. 14.19 × 4 =
  15. 15.57 × 4 =
  16. 16.35 × 8 =
  17. 17.39 × 8 =
  18. 18.35 × 4 =
  19. 19.31 × 8 =
  20. 20.13 × 4 =
  21. 21.42 × 4 =
  22. 22.28 × 4 =
  23. 23.40 × 8 =
  24. 24.12 × 8 =
  25. 25.58 × 4 =
  26. 26.65 × 4 =
  27. 27.12 × 4 =
  28. 28.64 × 4 =
  29. 29.52 × 4 =
  30. 30.71 × 4 =
  31. 31.33 × 8 =
  32. 32.23 × 8 =
  33. 33.36 × 8 =
  34. 34.16 × 8 =
  35. 35.27 × 8 =
  36. 36.24 × 8 =
  37. 37.16 × 4 =
  38. 38.27 × 4 =
  39. 39.72 × 4 =
  40. 40.33 × 4 =

Answer key

  1. 112
  2. 136
  3. 152
  4. 304
  5. 92
  6. 196
  7. 296
  8. 124
  9. 180
  10. 248
  11. 104
  12. 152
  13. 200
  14. 76
  15. 228
  16. 280
  17. 312
  18. 140
  19. 248
  20. 52
  21. 168
  22. 112
  23. 320
  24. 96
  25. 232
  26. 260
  27. 48
  28. 256
  29. 208
  30. 284
  31. 264
  32. 184
  33. 288
  34. 128
  35. 216
  36. 192
  37. 64
  38. 108
  39. 288
  40. 132

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