计算.(1)3-0.5×2(2) 4 5 + 1 3 - 1 15 (3) 3 4 ÷( 1 2 - 3 8 )(4)2

计算.
(1)3-0.5×2
(2)
4
5
+
1
3
-
1
15

(3)
3
4
÷(
1
2
-
3
8

(4)26.4÷(2.5×3-1.5)
(5)(4.4-1.8)×(0.4+2)
(6)2-
5
4
×
8
15
-
1
3

(7)[1-(
1
6
+
1
4
)]÷
7
10
cndoall 1年前 已收到1个回答 举报

abbykid 幼苗

共回答了18个问题采纳率:94.4% 举报

(1)3-0.5×2,
=3-1,
=2;

(2)
4
5 +
1
3 -
1
15 ,
=
17
15 -
1
15 ,
=
16
15 ;

(3)
3
4 ÷(
1
2 -
3
8 ),
=
3
4 ÷
1
8 ,
=6;

(4)26.4÷(2.5×3-1.5),
=26.4÷(7.5-1.5),
=26.4÷6,
=4.4;

(5)(4.4-1.8)×(0.4+2),
=2.6×2.4,
=6.24;

(6)2-
5
4 ×
8
15 -
1
3 ,
=2-
2
3 -
1
3 ,
=2-(
2
3 +
1
3 ),
=2-1,
=1;

(7)[1-(
1
6 +
1
4 )]÷
7
10 ,
=[1-
5
12 ]÷
7
10 ,
=
7
12 ×
10
7 ,
=
5
6 .

1年前

8
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