题目内容

口算.
1
2
5
÷0.5=
1
1
2
-1
1
2
÷1
1
2
=
1.25×
3
4
×8=
4
7
×5.6=
1
5
÷5×
1
5
×5=
4
1
2
×0×4
1
2
=
120×(
1
15
+
1
12
)=
3
7
+0.29+
4
7
=
3
1
5
-
2
9
-
7
9
=
3
4
-
2
5
)×20=
1
2
5
÷0.5=2.8,
1
1
2
-1
1
2
÷1
1
2
=
1
2
1.25×
3
4
×8=7
1
2
4
7
×5.6=3.2,
1
5
÷5×
1
5
×5=
1
25
4
1
2
×0×4
1
2
=0,
120×(
1
15
+
1
12
)=18,
3
7
+0.29+
4
7
=1.29,
3
1
5
-
2
9
-
7
9
=2
1
5
3
4
-
2
5
)×20=7.
故答案为:2.8,
1
2
7
1
2
,3.2,
1
25
,0,18,1.29,2
1
5
,7.
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