(1)(6.8-6.8×0.55)÷8.5
(2)0.12× 4.8÷0.12×4.8
(3)(3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)÷1.6
(4).6-1.6÷4= 5.38+7.85-5.37=
(5)7.2÷0.8-1.2×5= 6-1.19×3-0.43=
(6)6.5×(4.8-1.2×4)= 0.68×1.9+0.32×1.9 (7).10.15-10.75×0.4-5.7
(7).32.52-(6+9.728÷3.2)×2.5
(8)2÷2.5+2.5÷2
(9)194-64.8÷1.8×0.9
(10).5180-705×6
(11).24÷2.4-2.5×0.8