问题 解答题
计算下面各题.
234÷7.2+6.5×0.8          
4.8+1.52÷0.4-0.4×6
(4.5-2.7)×(3.8+0.75)7.2÷[(7.22-6.41)÷9].
答案

①234÷7.2+6.5×0.8,

=32.5+5.2,

=37.7;

②4.8+1.52÷0.4-0.4×6,

=4.8+3.8-2.4,

=6.2;

③(4.5-2.7)×(3.8+0.75),

=1.8×4.55,

=8.19;

④7.2÷[(7.22-6.41)÷9],

=7.2÷[0.81÷9],

=7.2÷0.09,

=80.

单项选择题
单项选择题