怎样算简便就怎样算. 4 9 × 1 5 ÷ 4 5 ; 4- 5 11 - 6 11 ; 1 8 ×58+42÷8;

怎样算简便就怎样算.
4
9
×
1
5
÷
4
5
4-
5
11
-
6
11
1
8
×58+42÷8;
36×(
2
3
+
1
6
-
3
4
);
(15-14×
4
7
)×
8
21
4
5
÷
5
8
-
1
2
÷
5
8
cy036 1年前 已收到1个回答 举报

zj14180504 幼苗

共回答了20个问题采纳率:90% 举报

(1)
4
9 ×
1
5 ÷
4
5
=
4
9 ×
1
5 ×
5
4 ,
=
1
9 ;

(2)4-
5
11 -
6
11
=4-(
5
11 +
6
11 ),
=4-1,
=3;

(3)
1
8 ×58+42÷8
=
1
8 ×58+42×
1
8 ,
=(58+42)×
1
8 ,
=100×
1
8 ,
=12.5;

(4)36×(
2
3 +
1
6 -
3
4 )
=36×
2
3 +36×
1
6 -36×
3
4 ,
=24+6-27,
=3;

(5)(15-14×
4
7 )×
8
21
=(15-8)×
8
21 ,
=7×
8
21 ,
=
8
3 ;

(6)
4
5 ÷
5
8 -
1
2 ÷
5
8
=
4
5 ×
8
5 -
1
2 ×
8
5 ,
=(
4
5 -
1
2 )×
8
5 ,
=
3
10 ×
8
5 ,
=
12
25 .

1年前

1
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