当a=4,b=5,c=6时,求下列各式的值a+3b-2c &...

当a=4,b=5,c=6时,求下列各式的值a+3b-2c abc÷12 bc÷a-b.
2024-11-08 11:55:57
推荐回答(1个)
回答(1):

(1)a+3b-2c
=4+3×5-2×6,
=7;           
(2)abc÷12,
=4×5×6÷12,
=10;              
(3)bc÷a-b,
=5×6÷4-5,
=2.5.