10+1
10+3
9-4
8-2
=11
=13
=5
=6
10+2
9-2
9-6
=12
=7
=3
10+5
=15
9-5
=4
9-1
=8
9-8
=1
8-7
8-6
=2
9-7
10+7
8-1
8-5
=17
10+4
=14
10+6
=16
10+8
=18
10+9
=19
9-3
8-3
8-4