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口算37÷27=2.1×17=200-31.4=10.28×198.2≈15+13=1-78÷78=0.36+0.2=47÷3×47÷3=

题目详情
口算
3
7
÷
2
7
=
2.1×
1
7
=
200-31.4= 10.28×198.2≈
1
5
+
1
3
=
1-
7
8
÷
7
8
=
0.36+0.2=
4
7
÷3×
4
7
÷3=
▼优质解答
答案和解析

3
7
÷
2
7
=
3
2

2.1×
1
7
=0.3

200-31.4=168.6

10.28×198.2≈2000
1
5
+
1
3
=
8
15
1-
7
8
÷
7
8
=0
0.36+0.2=0.56
4
7
÷3×
4
7
÷3=
16
441