1÷25%=
0.22=
-0.2=
×2 ÷ ×2=
1.4-1.08=
0×(-)=
+÷+=
99×0.8+0.8=
×3= ×13= 15×= 18×=
×= ×= ×= ×=
①5++
②-(-)
③+++
④101×-
⑤-+0.875-0.4
⑥+-
= 1.8-40%= 12÷=
×72%= 3.5×= -×=
×50%=
×= 3.2×= ×× ×-×=
= ÷= 8÷8÷ ×5-2×=
÷= 21÷= ×0.3= ÷-×0=
0.55-= ÷4.5= ×= +×30%=
8×8
×1