Question

简便运算 1.13/9+18/9+17/9 2.8.2-0.6*(0.9-0.75) 3.47.3-1.7*5-1.5 4.3.7*5.4+0.37*46

Answer 1

13/9+18/9+17/9　= (13+18+17)/9=48/9=16/3=5又3分之1
8.2-0.6*(0.9-0.75) =8.2-0.6*0.15=8.2-0.09=8.11
47.3-1.7*5-1.5 =47.3 -1.7*5 - 0.3*5 = 47.3 -(1.7+0.3)*5=47.3-1=46.3
3.7*5.4+0.37*46 =3.7*5.4+3.7*4.6=3.7*(5.4+4.6)=37

追问

13/9+18/9+17/9
这题能写清楚点吗??
看不懂

追答

13/9+18/9+17/9　= (13+17)/9+2=10/3+2=3又3分之1+2=5又3分之1