17-9= 48-5= 23+60= 14-7=
12-8= 6+8= 16-4= 3+21=
65-50= 9+3= 15-9-6= 8+7-9=
41+839
45+3040+35
84-775
38+4081-9
82-4051-9
66+786-8
我会算:
答:图书角还剩□本书
86-40=
38+9=
14-5=
7+31=
72-8=
40-20+3=
27-8=
40+25=
75-9=
9+9=
24+30=
6+47=
16-7=
67-6=
25+25=
5+7=
90-70=
13-6=
59-30=
32+10=
76-20=
40+18=
96-56=
30+70=
95-3=
70+5=
40+60=
6+25=
35+50=
74-8=
56-9
67+30=
45+50=
55-20=
83-=43 32+=40 -20<28
+30=74 -9=35 62-=56+