①5.8×1.01-9.9÷3.6
②3.8×6.5-6.5+6.5×7.2
③0.125×6.4×0.5
④[1÷(0.1×0.1)] ×4.9+5.1
+=
63=
2.95×1000=
-=
+0.5=
1.25×0.8×0=
2--=
6.12+2.88=
-+=
3.7×1.4×0.05 12.5×0.4×2.5×8
( )
①210÷35+12×109
②2.5×1.25×16
③()×12
④ [()]