19
18
15
10
12
14
11
6+=10
-2=7
9-=9
+3=9
9-=5
8+=10
10+7 11-2 4+8 19-4 7+6
<<<<
=6 >6 7< 5< 4>
2+1=
4-3=
2-1=
7-4=
3+2=
3+4=
5-2=
2+2=
6-3=
3+3=
7-6=
0+3=
5-0=
4+2=
1-0=
5-57=
1+6=
7-1=
4-1=
2+5=
10-4= 7+0= 4+4+2=
7-3= 8+1= 9-5-3=
8-3= 7+3= 3-1+7=
12÷=
÷=
=232+418+182
=232+600
=832( )
改正:
=46+454+137+563
= 500+700
= 1200( )