脱式计算 1800-1350÷18×6 17.64÷[(2.3+0.5)×0.6] 3/5÷[(3/4-2/3)÷5/6].

问题描述:

脱式计算
1800-1350÷18×6    
17.64÷[(2.3+0.5)×0.6]

3
5
÷[(
3
4
-
2
3
)÷
5
6
].

(1)1800-1350÷18×6
=1800-75×6
=1800-450
=1350;
    
(2)17.64÷[(2.3+0.5)×0.6]
=17.64÷[2.8×0.6]
=17.64÷1.68
=10.5;
(3)

3
5
÷[(
3
4
-
2
3
)÷
5
6
]
=
3
5
÷[
1
12
×
6
5
]
=
3
5
×10
=6.