4.7*1.58+0.53*15.8和39.78÷

4.7*1.58+0.53*15.8和39.78÷1.8÷6.8的简便运算

1个回答

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