题目
计算.
(1)
5400﹣2940÷28×27
(2)
(20.2×0.4+7.88)÷4.2
(3)
( )÷ +
(4)
10÷[ ﹣( ÷ + )].
答案: 5400﹣2940÷28×27 =5400﹣105×27 =5400﹣2835 =2565
(20.2×0.4+7.88)÷4.2 =(8.08+7.88)÷4.2 =15.96÷4.2, =3.8
( 45+14 )÷ 73 + 710 = 2120 ÷ 73 + 710 = 920 + 710 =1 320
10÷[ 83 ﹣( 513 ÷ 526 + 25 )] =10÷[ 83 ﹣(2+ 25 )] =10÷[ 83 ﹣ 125 ] =10÷ 415 =37 12