+
5+5=
10
2+_=1
-1
10-5=
5
2x1=
2
300+1345=
1645
0000+_=1000
1000
9000-90=
8910
5x10=
50
4000+00000000000000000000000000=
4000
2+_=1000
998
5-10=
-5
000x10000000000000000=
0
5000+10000=
1500
7700+_=100
-7600
2-90=
-88
100x90=
1000
1000+9000=
10,000
0+_=9
9
100-2000=
1900-
1x1=
1