问题 解答题

用递等式计算.

(1)214.6-(3.05+7.1)×1.8

(2)(2.44-1.8)÷0.4×23.

答案

(1)214.6-(3.05+7.1)×1.8,

=214.6-10.15×1.8,

=214.6-18.27,

=196.33;

(2)(2.44-1.8)÷0.4×23,

=0.64÷0.4×23,

=1.6×23,

=36.8.

单项选择题
单项选择题