文档介绍：1
×5 ﹦ × =
×5= ×=
× = ×=
×250= ×=
× 88 = ××6=
× 35 = ×=
× 48= 52× =
-- = +=
× = +=
× 4 = + =
× 6 = ×=
×= × =
×= × =
21
×＝ ×=
200×＝ 12-＝
×＝ ×＝
×= ×＝
-= ×11＝
×= ×=
×= ×=
×= × =
×= ×4＝
7
5×＝ ＋＝
×4＝ ×100＝
×10＝ ×1000＝
×100＝ ×＝
×＝ ×＝
×＝ ×＝
×＝ ×25＝
×＝ －＝
＋＝ ＋＝
＋＝ －＝
×4＝ ×＝
＋＝ ×＝
×4＝ ×10＝
×8＝ ×＝
0×＝ 77×＝
12－＝ －＝
×＝ ×＝
×3= ×(5×)=
7×= ×=
×= ×=
4×××= 13＋×=
4×= 7×=
+= 24×=
×= ×=
21
9×= 10×=
-= -=
1-= ×=
×= 0×=
×= +-2=
9--= (+)×=
+×= ×2-=
×+= ×=
×= ×=
10×= 35×=
×= ×=