用简便运算算出结果.
来源:学生学帮网 编辑:学帮网 时间:2024/07/04 04:48:18
用简便运算算出结果.
117*3又3/8-1.7*37.5
=117*3.375-1.7*3.75
=(100+17)*3.375-1.7*3.75
=337.5+17*3.375-1.7*3.75
=337.5+17*(3+0.375)-1.7*3.75
=337.5+51+17*0.375-1.7*3.75
=337.5+51
=387.5 .
用简便运算算出结果.
117*3又3/8-1.7*37.5
=117*3.375-1.7*3.75
=(100+17)*3.375-1.7*3.75
=337.5+17*3.375-1.7*3.75
=337.5+17*(3+0.375)-1.7*3.75
=337.5+51+17*0.375-1.7*3.75
=337.5+51
=387.5 .