计算4.58*3.2+8.9*5.42+5.7*4.58
要简便运算,还要过程.
参考答案:4.58*3.2+8.9*5.42+5.7*4.58
=4.58*(3.2+5.7)+8.9*5.42
=4.58*8.9+8.9*5.42
=8.9*(4.58+5.42)
=8.9*10
=89
要简便运算,还要过程.
参考答案:4.58*3.2+8.9*5.42+5.7*4.58
=4.58*(3.2+5.7)+8.9*5.42
=4.58*8.9+8.9*5.42
=8.9*(4.58+5.42)
=8.9*10
=89