凑24:(1)1,6,6,8. (2)2,7,9,10. (3)5,6,7,9. (4)2,5,6,9.

问题描述:

凑24:(1)1,6,6,8. (2)2,7,9,10. (3)5,6,7,9. (4)2,5,6,9.

6÷(1-6÷8)=24
(10+2)x(9-7)=24
(7-5)x9+6=24
9+6x(5÷2)=24