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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 873 · 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. 3.56 × 4 =
  4. 4.60 × 4 =
  5. 5.17 × 8 =
  6. 6.25 × 8 =
  7. 7.12 × 4 =
  8. 8.30 × 4 =
  9. 9.16 × 4 =
  10. 10.24 × 4 =
  11. 11.39 × 8 =
  12. 12.63 × 4 =
  13. 13.27 × 8 =
  14. 14.29 × 8 =
  15. 15.44 × 4 =
  16. 16.30 × 8 =
  17. 17.38 × 8 =
  18. 18.31 × 8 =
  19. 19.28 × 4 =
  20. 20.22 × 8 =
  21. 21.45 × 4 =
  22. 22.19 × 8 =
  23. 23.16 × 8 =
  24. 24.37 × 8 =
  25. 25.18 × 8 =
  26. 26.69 × 4 =
  27. 27.20 × 8 =
  28. 28.17 × 4 =
  29. 29.13 × 8 =
  30. 30.72 × 4 =
  31. 31.75 × 4 =
  32. 32.33 × 8 =
  33. 33.40 × 8 =
  34. 34.64 × 4 =
  35. 35.54 × 4 =
  36. 36.59 × 4 =
  37. 37.61 × 4 =
  38. 38.23 × 4 =
  39. 39.21 × 8 =
  40. 40.26 × 8 =

Answer key

  1. 280
  2. 128
  3. 224
  4. 240
  5. 136
  6. 200
  7. 48
  8. 120
  9. 64
  10. 96
  11. 312
  12. 252
  13. 216
  14. 232
  15. 176
  16. 240
  17. 304
  18. 248
  19. 112
  20. 176
  21. 180
  22. 152
  23. 128
  24. 296
  25. 144
  26. 276
  27. 160
  28. 68
  29. 104
  30. 288
  31. 300
  32. 264
  33. 320
  34. 256
  35. 216
  36. 236
  37. 244
  38. 92
  39. 168
  40. 208

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