简便方法计算我很快. (1)101×0.36 (2)5.8×7.3+4...

2023-01-06

【题目】简便方法计算我很快.   

(1)101×0.36   

(2)5.8×7.3+4.2×7.3   

(3)25×0.77×0.4   

(4)4.75×99+4.75

【答案】(1)36.36  (2)73  (3)7.7  (4)475

【解析】

(1)101×0.36

=(100+1)×0.36

=100×0.36+1×0.36

=36+0.36

=36.36

(2)5.8×7.3+4.2×7.3  

=(5.8+4.2)×7.3

=10×7.3

=73

(3)25×0.77×0.4  

=25×0.4×0.77

=10×0.77

=7.7

(4)4.75×99+4.75  

=4.75×(99+1)

=4.75×100

=475