level.1
9-8=
1
10+9=
19
9-6=
3
9*4=
36
100-50=
50
21+78=
99
32-20=
-12
10*2=
20
30-13
17
20+22=
42
200+100=
300
200*4=
800
300/6=
50
47*17=
799
34-5=
29
78*23=
1794
43*12
516
23/23=
1
99+80=
179
(45*12)-6=
534
120-50=
70
56*90=
5040
280*7=
1960
500*30=
15,000
60-(12*40)+5-13=
-428