Question

脱式计算5400-2940÷28×27（20.2×40%+7.88）÷4.2（ 4 5 + 1 4 ）÷ 7 3

脱式计算5400-2940÷28×27（20.2×40%+7.88）÷4.2（ 4 5 + 1 4 ）÷ 7 3 + 7 10 10÷[2.6-（ 5 13 ÷ 5 26 + 2 5 ）]．

Answer 1

（1）5400-2940÷28×27
=5400-105×27
=5400-2835
=2565；
（2）（20.2×40%+7.88）÷4.2
=（20.2×0.4+7.88）÷4.2
=（8.08+7.88）÷4.2
=15.96÷4.2
=3.8；
（3）（
4
5
+
1
4
）÷
7
3
+
7
10
=
21
20
×
3
7
+
7
10
=
9
20
+
7
10
=
23
20
；
（4）10÷[2.6-（
5
13
÷
5
26
+
2
5
）]
=10÷[2.6-（
5
13
×
26
5
+
2
5
）]
=10÷[2.6-（2+0.4）]
=10÷[2.6-2.4]
=10÷0.2
=50．

Answer 2

搜一下：脱式计算5400-2940÷28×27（20.2×40%+7.88）÷4.2（
4
5
+
1
4
）÷
7
3