文档介绍：7×÷7×=
×30%=
1÷15=
×÷×9=
92=
+×0=
=
-=
-=
8×=
1×8+1×2=
-+=
12÷
+×0=
78-=
×3=
+9=
-×=
×5×7=
×8=  
78-=
-=
70-34 =
3+-3+=
÷=
-=
5—=
×0=
1÷-÷1=
– =
÷=
÷=
÷7=
1÷10%=
+=
3--=
×5×7=
9--=
+ =
÷6=
1÷-÷1=
14÷35=
1-1×=
1÷×=
3—=
××=
12×(-)=
÷=
×4=
×=
÷+×8=
÷ =
× =
24×13=
1-=
÷=
-=
14÷35=
×4÷×4=
÷-÷=
( +)×4=
199+65=
×=
-=
+=
-=
576-198=
7÷ ÷4=
+1÷2=
+=
-=
-=
+=
××=
- =
+=
÷=
××=
×4=
÷ =
-×=
2-=
127+28=
×8=
45×=
÷2=
32÷10000=
-1=
÷=
5——=
2——=
×10% =
×8 =
×=
÷4=
3+-3+=
×400=
- =
÷=
(25%-) ×=
+÷=
2006-699=
8÷20=
×
+9=
1÷×=
+++=
÷=
+=
÷=
3÷7=
×=
45×=
÷=
+=
÷ 7 =
- =
÷25%×=
×2÷×2=
+=
2÷3=
÷=
(-6)×=
×=
÷=
40×101=
2÷7=
10-=
88-55=
-=
×101=
2÷=
×=
÷3×2=
-=
×÷=
+=
×4+4×=
—=
+ =
4÷2=
3-1=
÷2=
÷=
×100=
1÷=
142-69=
+ 4 =
0 ×=
+=
8-3=
1800-799=
560÷8×7=
×4+4×=
31×197≈
9×=
+8=
-=
-=
++=
÷+×8=
÷26=
60-14=
19+24 =
× =
84÷7