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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 888 · 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. 1.31 × 8 =
  2. 2.24 × 4 =
  3. 3.33 × 8 =
  4. 4.47 × 4 =
  5. 5.17 × 4 =
  6. 6.42 × 4 =
  7. 7.72 × 4 =
  8. 8.58 × 4 =
  9. 9.16 × 4 =
  10. 10.53 × 4 =
  11. 11.28 × 8 =
  12. 12.26 × 8 =
  13. 13.13 × 4 =
  14. 14.18 × 4 =
  15. 15.29 × 8 =
  16. 16.38 × 8 =
  17. 17.33 × 4 =
  18. 18.22 × 8 =
  19. 19.35 × 8 =
  20. 20.20 × 8 =
  21. 21.71 × 4 =
  22. 22.34 × 4 =
  23. 23.37 × 8 =
  24. 24.37 × 4 =
  25. 25.12 × 8 =
  26. 26.24 × 8 =
  27. 27.27 × 8 =
  28. 28.17 × 8 =
  29. 29.14 × 8 =
  30. 30.50 × 4 =
  31. 31.18 × 8 =
  32. 32.15 × 4 =
  33. 33.52 × 4 =
  34. 34.16 × 8 =
  35. 35.40 × 8 =
  36. 36.57 × 4 =
  37. 37.32 × 8 =
  38. 38.36 × 4 =
  39. 39.28 × 4 =
  40. 40.43 × 4 =

Answer key

  1. 248
  2. 96
  3. 264
  4. 188
  5. 68
  6. 168
  7. 288
  8. 232
  9. 64
  10. 212
  11. 224
  12. 208
  13. 52
  14. 72
  15. 232
  16. 304
  17. 132
  18. 176
  19. 280
  20. 160
  21. 284
  22. 136
  23. 296
  24. 148
  25. 96
  26. 192
  27. 216
  28. 136
  29. 112
  30. 200
  31. 144
  32. 60
  33. 208
  34. 128
  35. 320
  36. 228
  37. 256
  38. 144
  39. 112
  40. 172

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