问题 解答题
直接写得数.
7
9
×45=
1
5
+
1
7
=
6.3÷0.01=2.5+1.25=6-
7
8
-
1
8
=
7
10
÷
1
2
=
390×0.02=510-240=0.13=10×
7
9
÷10×
7
9
=
答案

7
9
×45=35,
1
5
+
1
7
=
12
35
6.3÷0.01=630,2.5+1.25=3.75,6-
7
8
-
1
8
=5,
7
10
÷
1
2
=
7
5
390×0.02=7.8,510-240=270,0.13=0.001,10×
7
9
÷10×
7
9
=
49
81

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