问题 解答题

简便计算:

2.37×6.3+2.37×3.7                      

2.5×1.25×0.32

4.4×25              

2.64÷5÷0.2              

3.8×10.1.

答案

(1)2.37×6.3+2.37×3.7

=(6.3+3.7)×2.37,

=10×2.37,

=23.7;

(2)2.5×1.25×0.32

=2.5×1.25××0.4×0.8,

=(2.5×0.4)×(1.25×0.8),

=1×1,

=1;

(3)4.4×25 

=(4+0.4)×25,

=4×25+0.4×25,

=100+10,

=110;

(4)2.64÷5÷0.2

=2.64÷(5×0.2),

=2.64÷1,

=2.64;

(5)3.8×10.1

=3.8×(10+0.1),

=3.8×10+3.8×0.1,

=38+0.38,

=38.38.

选择题
单项选择题 A1/A2型题