7+2=
9-7=
9-2=
5+3=
8-5=
8-3=
4+3=
7-4=
7-3=
4+4=
8-4=
5+4=
9-5=
4+2=
6-4=
9-3=
9-6=
8-1=
8-7=
4-1=
4-3=
9
9-7=
2
9-2=
7
5+3=
8
8-5=
3
8-3=
5
4+3=
7
7-4=
3
7-3=
4
4+4=
8
8-4=
4
5+4=
9
9-5=
4
4+2=
6
6-4=
2
9-3=
6
9-6=
3
8-1=
7
8-7=
1
4-1=
3
4-3=
1
答案:
7+2=9
9-7=2
9-2=7
5+3=8
8-5=3
8-3=5
4+3=7
7-4=3
7-3=4
4+4=8
8-4=4
5+4=9
9-5=4
4+2=6
6-4=2
9-3=6
9-6=3
8-1=7
8-7=1
4-1=3
4-3=1
9-7=2
9-2=7
5+3=8
8-5=3
8-3=5
4+3=7
7-4=3
7-3=4
4+4=8
8-4=4
5+4=9
9-5=4
4+2=6
6-4=2
9-3=6
9-6=3
8-1=7
8-7=1
4-1=3
4-3=1
6+2=
8-6=
8-2=
2+5=
7-2=
7-5=
8+1=
9-8=
9-1=
6+1=
7-1=
3+3=
6-3=
6+3=
9-6=
9-2=
9-7=
6-4=
6-2=
6+0=
6-0=
8
8-6=
2
8-2=
6
2+5=
7
7-2=
5
7-5=
2
8+1=
9
9-8=
1
9-1=
8
6+1=
7
7-1=
6
3+3=
6
6-3=
3
6+3=
9
9-6=
3
9-2=
7
9-7=
2
6-4=
2
6-2=
4
6+0=
6
6-0=
6
答案:
$6 + 2 = 8$;$8 - 6 = 2$;$8 - 2 = 6$;$2 + 5 = 7$;$7 - 2 = 5$;$7 - 5 = 2$;$8 + 1 = 9$;$9 - 8 = 1$;$9 - 1 = 8$;$6 + 1 = 7$;$7 - 1 = 6$;$3 + 3 = 6$;$6 - 3 = 3$;$6 + 3 = 9$;$9 - 6 = 3$;$9 - 2 = 7$;$9 - 7 = 2$;$6 - 4 = 2$;$6 - 2 = 4$;$6 + 0 = 6$;$6 - 0 = 6$。
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