问题 解答题
直接写得数.
42×25%=
11-
4
9
=
1÷0.25=
3
7
×
5
3
÷
3
7
=
5
6
×
8
15
=
1
4
+
3
4
=
31×198≈4.8×11-4.8=
答案

42×25%=10.5,11-
4
9
=10
5
9
1÷0.25=4,
3
7
×
5
3
÷
3
7
=
5
3
5
6
×
8
15
=
4
9
1
4
+
3
4
=1,
31×198≈6000,4.8×11-4.8=48.

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