78.2*4.6+0.8*8.2+21.8*5.4的简便运算

78.2*4.6+0.8*8.2+21.8*5.4的简便运算
2025-05-15 10:58:57
推荐回答(1个)
回答1:

=(782*46+8*82+218*54)/100
=(391*23+4*41+109*27)4/100
=[(400-9)23+4(40+1)+(100+9)27]4/100
=[9200-207+160+4+2700+243]4/100
=[11900+160+247-207]4/100
=[12060+40]4/100
=12100*4/100
=121*4
=484