文档介绍:-= -= +=
-= += -=
-= += -=
1+0
×8= ×4= ×0=
×50= 30×= ×3=
×2= ×= ×=
×2= ×10= ×8= ×2=
×10= ×= ×20= +=
+= ×2= -= ×=
6×= -= ×= ×100=
×= ×= ÷7= ×100=
÷= ×8= ÷= ÷2=
÷28= ÷= ÷= ×9=
÷24= ×= += -=
÷4= ÷13= ÷5= +=
10÷20= 24÷15= ×10= ×=×= ×1000= ×= ×=
÷= ÷9= ÷= ÷2=
÷= ÷= ×100= ×8=
0. 56÷= ×4= ×= ÷=
×= ×= ×= ÷=
1÷= ×= ÷= 0÷=
×102= ÷= 5×= -=
÷ ÷= 5×= 24×=
×= += ÷= 5÷=
÷= ÷= ÷5= 7×=
÷= -= ÷= ÷8=
×= 8+= ×30= ×=
×= 0÷6= ÷= ÷=
2÷5= +5= ÷= ÷=
×= += 8×= ÷=
+= ÷28= 10÷20= ÷=
10-= ×= += ÷=
×100= ×100= ÷2= ÷9=
÷= ÷= 3÷5= 7×=
12÷= ×= ÷=