计算下列各题(能简算的写出简算过程) 1 8 + 5 7 +6.875+ 2 7 7

2025-04-08 13:50:03
推荐回答(1个)
回答1:

(1)
1
8
+
5
7
+
6.875+
2
7

=
1
8
+
5
7
+
6
7
8
+
2
7

=(
1
8
+
6
7
8
)+(
5
7
+
2
7
),
=7+1,
=8;

(2)
7
9
÷
11
5
+
2
9
×
5
11

=
7
9
×
5
11
+
2
9
×
5
11

=
5
11
×(
7
9
+
2
9
),
=
5
11
×
1,
=
5
11


(3)
1
3
÷
2
3
-
2
5
)×
3
5

=
1
3
÷
10
15
-
6
15
)×
3
5

=
1
3
÷
4
15
×
3
5

=
1
3
×
15
4
×
3
5

=
3
4


(4)4.82-5.2÷0.8×0.6,
=4.82-6.5×0.6,
=4.82-3.9,
=0.92.