怎样简便就怎样算.49×15÷4536×(23+16-34)18×58+42÷84-511-611(15-14×47)×82145÷58-12÷58.-六年级数学

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3+
1
6
-
3
4
),
=36×
2
3
+36×
1
6
-36×
3
4

=24+6-27,
=30-27,
=3;

(3)
1
8
×58+42÷8,
=(58+42)×
1
8

=100×
1
8

=12.5;

(4)4-
5
11
-
6
11

=4-(
5
11
+
6
11
),
=4-1,
=3;

(5)(15-14×
4
7
)×
8
21

=(15-8)×
8
21

=7×
8
21

=2
2
3


(6)
4
5
÷
5
8
-
1
2
÷
5
8

=
32
25
-
4
5

=
12
25
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