问题 解答题
直接写得数.
50×60=
300÷3=260+450=52×10=
240÷6=540+380=630÷7=100-26=
12×50=360-280=96÷4=750-160=
1
5
+
3
5
=
2
7
+
5
7
=
3
4
-
2
4
=
4
9
-
4
9
=
3
4
-
1
4
=
1-
3
4
=
答案

50×60=3000;300÷3=100;260+450=710;52×10=520;
240÷6=40;540+380=920;630÷7=90;100-26=74;
12×50=600;360-280=80;96÷4=24;750-160=590;
1
5
+
3
5
=
4
5
2
7
+
5
7
=1;
3
4
-
2
4
=
1
4
4
9
-
4
9
=0;
3
4
-
1
4
=
1
2
1-
3
4
=
1
4

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