问题
解答题
当a=4,b=5,c=6时,求下列各式的值
a+3b-2c
abc÷12
bc÷a-b.
答案
(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.
当a=4,b=5,c=6时,求下列各式的值
a+3b-2c
abc÷12
bc÷a-b.
(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.