文档介绍:+15X 6=
+ 5X 8=
+ 2X4=
3+8=
+ 4+20 X 5=
+12+3+20=
7.(80+ 20+80)+4=
+(100-10X 5)=4+8=
+ 16 =
+ 6+20=
+ 26 =
-5X 7=
+17 =
+60+3=
+ 40 =
+ 18+2=
20 =
-11X 5=
4 =
+7-29=
40 =
80=
" 4 =
16=
+ 60=
2=
+ 2 =
6=
+ 4 =
6=
+ 5 =
9=
+ 8 =
20=
+ 4 =
+ 6 =
+80 =
-80 =
80 =
+ 80 =
+ 16 =
+ 24 =
5=
250=
518=
76=
10=
6=
3=
18=
4=
15=
30=
15=
12=
30=
50=
700=
+15X 6=
+ 5X 8=
+ 2X4=
3+8=
+ 4+20 X 5=
+12+3+20=
4=
-80=
+70=
-64+ 8=
+ 6+20=
-5X 7=
+60+ 3=
+18+2=
-11X 5=
+7-29=
80=
16=
25=
11 =
+ 25=
+70=
9X4=
-33X 3= -1010=
50=
8=
11 =
/ 25=
-2200=
+80=
8X 5=
-3X 200=
+20+ 2=
-2升 5=
+8-40=
40=
+(100-10X 5)=
+ 24 =
+ 40=
+14 =
20=
+ 13 =
-25=
+ 15 =
+45=
24 =
25 =
+ 14 =
7.(80+ 20+80)+4=
50=
700=
+ 16 =
+ 21 =
+ 14 =
+ 13 =
+ 15 =
+ 24 =
+ 17 =
+ 15 =
+ 16 =
+ 26 =
+ 17 =
+ 40 =
+20 =
+4 =
+ 40 =
+4 =
+ 60=
+ 2 =
+ 4 =
+ 5 =
+ 8 =
+ 4 =
+ 6 =
+80 =
-80 =
80 =
+ 80 =
+ 16 =
+ 24 =
5=
250=
518=
76=
10=
6=
3=
18=
4=
15=
30=
15=
12=
30=
200=
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