25+68+68+68+74简便运算
问题描述：
25+68+68+68+74简便运算
答
25+68+68+68+74简便运算
25+70-2+70-2+70-2+70+4
=23+70*4
=20+3+280
=300+3
=303
答
25+68+68+68+74
= 25 + 70 + 70 + 70 + 75 - 7
= （25 + 75 ） + 70 *3 - 7
= 310 - 7
= 303
答
25+75-1+70*3-2*3=100+210-7=303
答
25+68+68+68+74
=25+74+68×3
=25+75-1+(70-2)×3
=100-1+210-6
=310-7
=303