Show:
Easy
Medium Easy
Medium
Medium Hard
Hard
100
5+-2=
3
100
9+-10=
-1
100
25+-36
-11
100
48+-50=
-2
100
590+-680=
-90
200
6+-3=
3
200
10+20=
30
200
34+-15
19
200
25+-25=
0
200
700+-906=
-206
300
5+-10=
-5
300
15+-30=
-15
300
7+6=
13
300
25+-48=
-23
300
160+-200
-40
400
-8+-12
-20
400
-213+-15=
-228
400
-4+1
-3
400
35+-25=
10
400
120+-160
-40
500
-9+3=
-6
500
-5+-6=
-11
500
-8+2
-6
500
17+-20=
-3
500
90+-100
10