问题 解答题
2.1×
10
7
=
3.75+1
1
4
=
0.125×32=62=0.18×
5
9
=
1
2
-
1
3
=
1
3
-
1
3
÷1=
15×(
1
3
+
1
5
)=
3
4
×
2
5
÷
3
4
×
2
5
=
1
4
÷25%×
1
8
=
答案

2.1×
10
7
=3,
3.75+1
1
4
=5,
0.125×32=4,62=36,0.18×
5
9
=0.1,
1
2
-
1
3
=
1
6
1
3
-
1
3
÷1=2
2
3
15×(
1
3
+
1
5
)=8,
3
4
×
2
5
÷
3
4
×
2
5
=
4
25
1
4
÷25%×
1
8
=
1
8

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