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10+20= 11-2= 50+4= 82+4=
48-10= 29+3= 16-7= 23-8=
24+9= 13+80= 19+5= 62-5=
12-4= 60-20= 13-3= 52+6=
37+8= 10+90= 35-5= 17+10=
17-5+4= 25-9-3= 34+(13-3)=
9+40+6= 68+8-6= 80-(10-6)=
①56-50=
②42+20=
③49-9=
④30+12=
⑤38+9=
⑥61-7=
⑦17-(9+3)=
⑧26+8−20=
⑨24+8+5=
口答:现在车上有( )个人。
3+8= 10+4= 14-9= 13-8= 80-20+25=
28+60= 86-5= 17-7= 60-10= 6+53-20=
88-77= 68-50= 26+3= 50+8= 34-30+30=
48-6= 10+45= 47+3= 40-( )=20 30+( )=60
42-8= 43+9= 55 + 7= 14-9+33=
37+60= 8+27= 51-9= 22+8+9=
26+3= 85-4= 43 + 6= 37-30+20=
66-6= 6+29= 100-70= 28-8-7=
14-6= 11-8= 7+5= 17-7+2=
8+9= 12-3= 15-9= 11-3-3=
19-8= 70+8= 78-8= 13-(6+3)=
50+40= 90-50= 54+4= 7+(14-9)=
35+50= 38-20= 59-5= 30+40-20 =
6+54= 85-9= 37-20+40= 39-(9-5)=
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