下面各题,怎样算简便就怎样算.6.2-0.54÷1.8×5 3.6×0.81+0.36×1.9 &...

2024-12-17 07:38:18
推荐回答(1个)
回答1:

(1)6.2-0.54÷1.8×5 
=6.2-1.5,
=4.7;
(2)3.6×0.81+0.36×1.9 
=3.6×0.81+3.6×0.19,
=(0.81+0.19)×3.6,
=3.6;
(3)27.6-11.31-5.69
=27.6-(11.31+5.69),
=27.6-17,
=10.6;
(4)4.05÷[1.8×(3.36-2.86)]
=4.05÷[1.8×0.5],
=4.05÷0.9,
=4.5.