4.7*1.58+0.53*15.8和39.78÷1.8÷6.8的简便运算

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4.7*1.58+0.53*15.8和39.78÷1.8÷6.8的简便运算

4.7*1.58+0.53*15.8 39.78÷1.8÷6.8
=4.7*1.58+5.3*1.58 =39.78÷(1.8*6.8) 等于(4.7+5.3)*1.58 =39.78÷12.24
=10*1.58 =3
=15.8