问题 解答题
50×60=30×23=240÷6=0÷8=
490÷7=480÷6=50×80=24×20=
10×90=32×30=810÷9=720÷8=
50×40=280÷4=
2
4
+
1
2
=
2
7
+
5
7
=
4
8
+
1
8
=
1
3
+
2
3
=
4
6
-
3
6
=
5
9
-
3
9
=
6
7
-
4
7
=
6
7
-
3
7
=
答案

50×60=3000,30×23=690,240÷6=40,0÷8=0,
490÷7=70,480÷6=80,50×80=4000,24×20=480,
10×90=900,32×30=960,810÷9=90,720÷8=90,
50×40=2000,280÷4=70,
2
4
+
1
2
=1,
2
7
+
5
7
=1,
4
8
+
1
8
=
5
8
1
3
+
2
3
=1,
4
6
-
3
6
=
1
6
5
9
-
3
9
=
2
9
6
7
-
4
7
=
2
7
6
7
-
3
7
=
3
7

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