题目内容

计算下面各题(能简算的要简算)
10
2
3
-(3.14+1
2
3
7.25+3
5
7
+
3
4
4
3
5
+
5
7
+1
12
35
9.05+5
1
4
-1
4
5
10.9-1.6-3
2
5
10
5
8
+(1.625+1
5
6
-
1
3
(1)10
2
3
-(3.14+1
2
3
),
=10
2
3
-1
2
3
-3.14,
=9-3.14,
=5.86;
(2)7.25+3
5
7
+
3
4

=7.25+0.75+3
5
7

=8+3
5
7

=11
5
7

(3)4
3
5
+
5
7
+1
12
35

=
23
5
+
5
7
+
47
35

=
161
35
+
25
35
+
47
35

=
233
35

(4)9.05+5
1
4
-1
4
5

=9.05+5.25-1.8,
=14.3-1.8,
=12.5;
(5)10.9-1.6-3
2
5

=10.9-(1.6+3.4),
=10.9-5,
=5.9;
(6)10
5
8
+(1.625+1
5
6
-
1
3
),
=10
5
8
+1
5
8
+(1
5
6
-
2
6
),
=12
1
4
+1
1
2

=12
1
4
+1
2
4

=13
3
4
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