问题 解答题
口算.
4.2÷
6
7
=
5
21
×3=
10
11
÷5=
1
8
+
2
9
)×72=
1
4
×12=
2
9
×1.8=
3
4
÷
1
4
=
答案

(1)4.2÷
6
7
=4.9
(2)
5
21
×3=
5
7
(3)
10
11
÷5=
2
11
(4)(
1
8
+
2
9
)×72=25
(5)
1
4
×12=3
(6)
2
9
×1.8=0.4
(7)
3
4
÷
1
4
=3

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