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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 882 · 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. 1.25 × 8 =
  2. 2.74 × 4 =
  3. 3.46 × 4 =
  4. 4.17 × 4 =
  5. 5.28 × 8 =
  6. 6.31 × 8 =
  7. 7.14 × 8 =
  8. 8.38 × 4 =
  9. 9.71 × 4 =
  10. 10.67 × 4 =
  11. 11.28 × 4 =
  12. 12.39 × 8 =
  13. 13.26 × 8 =
  14. 14.25 × 4 =
  15. 15.29 × 8 =
  16. 16.16 × 8 =
  17. 17.33 × 4 =
  18. 18.53 × 4 =
  19. 19.22 × 4 =
  20. 20.23 × 8 =
  21. 21.52 × 4 =
  22. 22.27 × 4 =
  23. 23.22 × 8 =
  24. 24.12 × 4 =
  25. 25.17 × 8 =
  26. 26.75 × 4 =
  27. 27.68 × 4 =
  28. 28.48 × 4 =
  29. 29.15 × 4 =
  30. 30.50 × 4 =
  31. 31.61 × 4 =
  32. 32.18 × 4 =
  33. 33.32 × 8 =
  34. 34.35 × 4 =
  35. 35.24 × 4 =
  36. 36.40 × 8 =
  37. 37.30 × 8 =
  38. 38.20 × 8 =
  39. 39.27 × 8 =
  40. 40.13 × 4 =

Answer key

  1. 200
  2. 296
  3. 184
  4. 68
  5. 224
  6. 248
  7. 112
  8. 152
  9. 284
  10. 268
  11. 112
  12. 312
  13. 208
  14. 100
  15. 232
  16. 128
  17. 132
  18. 212
  19. 88
  20. 184
  21. 208
  22. 108
  23. 176
  24. 48
  25. 136
  26. 300
  27. 272
  28. 192
  29. 60
  30. 200
  31. 244
  32. 72
  33. 256
  34. 140
  35. 96
  36. 320
  37. 240
  38. 160
  39. 216
  40. 52

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