问题 解答题
用递等式计算.
75×24+836÷4
(7.6-3.6÷2)×1.5
7
16
×9+7÷
16
7

5
7
÷[1÷(
2
3
-
1
5
)].
答案

(1)75×24+836÷4,

=1800+209,

=2009;

(2)(7.6-3.6÷2)×1.5,

=(7.6-1.8)×1.5,

=5.8×1.5,

=8.7;

(3)

7
16
×9+7÷
16
7

=

7
16
×9+7×
7
16

=(9+7)×

7
16

=16×

7
16

=7;

(4)

5
7
÷[1÷(
2
3
-
1
5
)],

=

5
7
÷[1÷
7
15
],

=

5
7
×
7
15

=

1
3

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