在如图○里填上合适的数,使每个正方形四个角上的数加起来等于1.
问题描述:
在如图○里填上合适的数,使每个正方形四个角上的数加起来等于1.
答
1-(
+1 4
+3 10
)1 20
=1-
3 5
=
;2 5
1-(
+1 5
+1 4
)2 5
=1-
17 20
=
;3 20
1-(
+1 5
+2 5
)3 10
=1-
9 10
=
;1 10
1-(
+1 5
+1 4
)1 10
=1-
11 20
=
;9 20
1-(
+1 10
+1 4
)3 10
=1-
13 20
=
.7 20
故答案为:
.