45.55-(6.82+15.55)
34.52-17.87-12.23
23.75-8.64-3.46
17.83-9.5-7.83-0.5
27.38-5.34+2.62-4.66
21.63-(8.5+9.63)
7.5-2.45+7.5+2.45
急求50道六年级数学简便计算,麻烦给回复
45.55-(6.82+15.55)
34.52-17.87-12.23
23.75-8.64-3.46
17.83-9.5-7.83-0.5
27.38-5.34+2.62-4.66
21.63-(8.5+9.63)
7.5-2.45+7.5+2.45