3÷= ×= ×= ÷22= ×÷×=
+= ()3= ÷= ×5×6= 0×÷=
36×()= ÷3= 25%+(-12.5%)÷=
=
4.5+=
-=
×1=
(▲)∶=
+-0.4=
6.4-3.32=
×=
+=
2.5×0.9×0.4=
9.6÷0.6=
0.3×0.4=
48×12.5%=
×5.6=
2÷2%=
-=
÷5=
÷14=
÷7=
÷=
72÷= -= 0××= ÷=
80%×= 7.7×= ÷4= 1÷-÷2=
A
2.5
20
B
2.6
19.6
C
18.5
27+68= 341﹣103= 270÷18= -=
2÷= 0.42×0.2= 3.5×50= ×=
+=