文档介绍：+=
×2=
-=
×=
6×=
-=
×=
×100=
×=
÷=
÷7=
÷100=
÷=
×8=
÷=
÷2=
÷28=
÷=
÷=
÷=
÷24=
×=
+= -=
÷4=
÷13=
÷5=
÷41=
10÷20=
24÷15=
×10=
×=
×=
×1000=
×=
×=
÷=
÷9=
÷=
÷2=
÷=
÷=
×100=
×8=
0. 56÷=
×4=
×=
÷=
×=
×=
×=
÷=
1÷=
×=
÷=
0÷=
×102=
9÷÷4=
××4=
(+)×=
-= -= +=
-= += -=
-= += -=
1-= += 5×400=
+= 187÷1000=
1+=
×10=
75÷10=
÷=
×7=
×7=
×8=
×8=
×2=
5×=
×=
×=
×0=
10×=
×7=
×100=
×4=
×4=
4×=
430-250= += -=
7200÷800=
+= -=
17×300=
-= +=
600×700=
+= +=
670+250= += -6=
8500÷500=
-= +=
25×100=
-= 2+=
380-290= += +=
3500÷70=
+3= +=
7500÷250=
+1=
-=
450+780= +=
3+=
630÷9=
-=
-5=
330×9=
-= -=
+=
1-=
+=
+=
+4=
4-=
+=
+=
+=
23×100=
-=
480÷40=
÷100=
+=
125×80=
÷10=
+=
70×12=
×100=
-=
-=
×10=
10+=
1-=
×1000=
+=
+=
×100=
-=
-=
63÷100=
-=
+=
80÷1000=
+=
-=
30×100=
-=
+=
+=
5+=
1-=
+=
+=
+=
+=
1-=
8-=
-=
+=
+=
-=