(15×26-180)÷5简便计算?
解:原式=15÷5×26-180÷5
=3×26-36
=78-36
=42
(15*26-180)/5
=(390-180)/5
=210/5
=42
(15×26-180)/5
=15×26/5-180/5
=3×26-36
=78-36
=42
(15*26-180)/5
=(15*26-180)*(1/5)
=(15*26)*(1/5)-180*(1/5)
=15*(1/5)*26-18*[10*(1/5)]
=3*26-8*2
=3*2*13-3*6*2
=3*2*(13-6)
=6*7
=42
=15×26÷5-180÷5
=3×26-36
=84-36
=48