(Blank)
1+1=
2
2+7=
9
2+3=
5
7+33=
40
45+25=
70
399+71=
470
77-16=
61
99+46=
145
999+1=
1000
76+14=
1-1=
0
107+3=
110
97+3=
100
87+3=
90
77+3=
80
23-7=
16
299+71=
370
18-11=
7
3-4
-1
1-9=
-8
7+72=
79
2+9=
11
98+72=
170
77-17=
60
78+22=
100