3·6乘31·4+43·9乘6·4

来源:学生作业学帮网 编辑:学帮网 时间:2024/06/10 19:42:12

3·6乘31·4+43·9乘6·4

3.6x31.4+43.9x6.4 =3.6x31.4+(31.4+12.5)x6.4 =31.4x(3.6+6.4)+12.5x0.8x8 =314+80 =394