1.25+1.75÷2.5
=1.25+(0.25x7)÷(0.25 x 10)
=1.25+ 7/10
=1.25 + 0.7
= 1.95好像反而复杂了，这样倒不如
1.25+1.75÷2.5

=1.25+（0.7x2.5）÷2.5
=1.25+0.7
=1.95
能不能简便运算吖这题恩恩你这样算 挺好的:)