-
. z
×= ÷= ×= ÷=
÷= ÷4×= ×= ÷=
+= 1-= += -=
+= -= += -=
÷= 18×= ×3= ×=
×= ÷= += ×=
15÷12= ×12= ÷5= ×=
28×= ×14= ×= ÷=
24×= ÷= -= ÷=
÷8= += ×= ×=
2×= ×3= ÷= ×=
×20= -= ×36= +2=
6×= ×= ÷= 2÷=
-
. z
33÷= ×= ×4= ÷=
-= += -=720÷800=
+= -=17×300= -=
+=×= += +=
+= += -=÷5=
-= +=×100= -=
2+=-= += +=
÷70= +3= +=÷25=
+1= -=+= +=
3+=÷9= -= -5=
×9= -= -=+=
1-= +=+= +4=
4-=+= += +=
23×100= -= -= 1-=
÷40=53÷100= += ×80=
-
.
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