问题 解答题
怎样简便就怎样算.
①5.5×17.3+2.7×5.5②1.25×(6.2-5.9)×80③1.5×99
④70.3-17.48÷7.6⑤3.64÷52×23.3⑥4.6×(1-0.25)+0.75×5.4.
答案

①5.5×17.3+2.7×5.5,

=5.5×(17.3+2.7),

=5.5×20,

=110;

②1.25×(6.2-5.9)×80,

=1.25×0.3×80,

=1.25×80×0.3,

=100×0.3,

=30;

③1.5×99,

=1.5×(100-1),

=1.5×100-1.5×1,

=150-1.5,

=148.5;

④70.3-17.48÷7.6,

=70.3-2.3,

=68;

⑤3.64÷52×23.3,

=0.07×23.3,

=1.631;

⑥4.6×(1-0.25)+0.75×5.4,

=4.6×0.75+0.75×5.4,

=(4.6+5.4)×0.75,

=10×0.75,

=7.5.

单项选择题
单项选择题