15-9= 67-5= 34+7= 40+30=
73-50= 26+9= 53-6= 69-50=
49+8= 77-7= 45+20= 9+36=
62+30-5= 43+(12-6)= 68+5-40 =
84-(30 +20)= 60+(14-8)= 20+50-7=
1元4角+5角=( )元( )角 2元5角+5角=( )元
40+28-50= 50+14-8= 56-7-20=
24+(26+4)= 45-(38-30)= 30+(26-7)=
13﹣4=
69+1=
51﹣9=
40﹣20﹣20=
5+40=
24+5=
37﹣5=
39﹣(14+6)=
64﹣30=
28+30=
8+24=
45+(10﹣7)=
40+20=
17-9=
56-3=
42+7=
20+30-7=
86-50=
48-8=
31+14=
56-21=
45+5-30=
40+30+8=
90-10-60=
26+40-4=
87-70+3=
63-(14+6)=
53-(37-7)=
20+60+8=
63-40-3=
36+30-9=
54+8-30=
42-8-30=
30+30+27=
70+28-90=
63-20+8=
10-(2+3)=
12-(9-7)=
20-(6+4)=
5+(2+8)=
23-9= 46-8= 20+50= 82-(43+7)=
80-40= 79-20= 57-5= 46-(17+3)=
24-6= 87-7= 63+20= 27+3+3=
32-2= 89+1= 12+10= 28-4-4=