问题 解答题
计算,能简算的要简算.
64×7.65.68×7.5184.6÷2.8
0.8×(1.25+50)47.6÷4÷2.536.45÷(0.82+3.4×0.2)
4.3×68+43×3.26.75÷[0.9÷(0.3×0.4)]3.72×0.1+3.72×8.9.
答案

(1)6.4×7.6=48.64;

(2)5.68×7.5=42.6;

(3)184.6÷2.8=

923
14

(4)0.8×(1.25+50),

=0.8×1.25+0.8×50,

=1+40,

=41;

(5)47.6÷4÷2.5,

=47.6÷(4×2.5),

=47.6÷10,

=4.76;

(6)36.45÷(0.82+3.4×0.2),

=36.45÷(0.82+0.68),

=36.45÷1.5,

=24.3;

(7)4.3×68+43×3.2,

=43×6.8+43×3.2,

=43×(6.8+3.2),

=43×10,

=430;

(8)6.75÷[0.9÷(0.3×0.4)],

=6.75÷[0.9÷0.12],

=6.75÷7.5,

=0.9;

(9)3.72×0.1+3.72×8.9,

=3.72×(0.1+8.9),

=3.72×9,

=33.48.

单项选择题
单项选择题