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合理、灵活地计算32×61.9+38.1×3225×16×50×0.1389×[0.75-(716-14)](1-47)÷[(0.1+1.1)÷0.2].

题目详情
合理、灵活地计算
32×61.9+38.1×32           
25×16×50×0.13
8
9
×[0.75-(
7
16
-
1
4
)]
(1-
4
7
)÷[(0.1+1.1)÷0.2].
▼优质解答
答案和解析
(1)32×61.9+38.1×32
=(61.9+38.1)×32,
=100×32,
=3200;

(2)25×16×50×0.13
=25×4×4×50×0.13,
=(25×4)×(4×50)×0.13,
=100×200×0.13,
=2600;

(3)
8
9
×[0.75-(
7
16
-
1
4
)],
=
8
9
×[
3
4
-(
7
16
-
4
16
)],
=
8
9
×[
12
16
-
3
16
],
=
8
9
×
9
16

=
1
2


(4)(1-
4
7
)÷[(0.1+1.1)÷0.2],
=
3
7
÷[1.2÷0.2],
=
3
7
÷6,
=
1
14