题目内容

脱式计算,能简算的要简算:
2
3
5
+4.6+4
2
5
+5.4
3
11
15
×2
1
7
-2
1
7
×3
4
15
85×1
1
5
+2.5÷4
1
6
1÷[(4
1
7
-0.005×700)÷1
2
7
].
(1)2
3
5
+4.6+4
2
5
+5.4,
=(2
3
5
+4
2
5
)+(4.6+5.4),
=7+10,
=17;

(2)3
11
15
×2
1
7
-2
1
7
×3
4
15

=2
1
7
×(3
11
15
-3
4
15
),
=
15
7
×
7
15

=1;

(3)85×1
1
5
+2.5÷4
1
6

=85×
6
5
+2.5×
6
25

=102+0.6,
=102.6;

(4)1÷[(4
1
7
-0.005×700)÷1
2
7
],
=1÷[(4
1
7
-3.5)÷1
2
7
],
=1÷[(4
1
7
-3
1
2
)÷1
2
7
],
=1÷[
9
14
÷1
2
7
],
=1÷[
9
14
×
7
9
],
=1÷
1
2

=2.
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