①5.3×1.2___5.3 ②3.6×0.9___3.6÷0.9 ③9.56÷0.1___956×0.1
+=
0.8-=
-=
0÷9.2=
2.28+7.72=
0.25×4=
×25×0.8 13.2×0.68+8.68×6.8 -+
+++ 3+4-+
3x-= x+= +-x=
, , ,