问题 解答题

(1)99×6.25+6.25

(2)(5.6×0.3-0.68)÷0.25×4

(3)6.9-(0.6+4.5)÷1.7

(4)7.2÷1.25÷0.8

(5)(25.5+17.25)÷0.25+0.75

(6)2.63×2.3+2.3+6.37×2.3.

答案

(1)99×6.25+6.25,

=(99+1)×6.25,

=100×6.25,

=625;

(2)(5.6×0.3-0.68)÷0.25×4,

=(1.68-0.68)÷0.25×4,

=1÷0.25×4,

=4×4,

=16;

(3)6.9-(0.6+4.5)÷1.7,

=6.9-5.1÷1.7,

=6.9-3,

=3.9;

(4)7.2÷1.25÷0.8,

=7.2÷(1.25×0.8),

=7.2÷1,

=7.2;

(5)(25.5+17.25)÷0.25+0.75,

=42.75÷0.25+0.75,

=171+0.75,

=171.75;

(6)2.63×2.3+2.3+6.37×2.3,

=(2.63+1+6.37)×2.3,

=10×2.3,

=23.

单项选择题
单项选择题