问题 解答题
口算.
24×75%=
5.2÷1.3=
4
5
-
1
3
=
3
4
×
8
21
=
3
4
=
3.1-0.3=
0.92=4.2+
1
2
÷0.5=
5
6
+
4
7
+
1
6
=
5
9
-
2
5
+
4
9
=
答案

24×75%=18,5.2÷1.3=4,
4
5
-
1
3
=
7
15
3
4
×
8
21
=
2
7
3
4
=4,
3.1-0.3=2.8,
0.92=0.81,4.2+
1
2
÷0.5=5.2,
5
6
+
4
7
+
1
6
=1
4
7
5
9
-
2
5
+
4
9
=
3
5

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