题目内容

下列各题,能简算的必须简算.
46×
44
45
4
5
-(
2
7
-
1
5
)÷
1
4
90×
4
91
5
36
÷[(
1
2
-
1
6
)×
5
9
]
8
17
÷23+
1
23
×
9
17
3
4
×
2
5
+
3
4
×0.6.

(1)46×
44
45
,
=(45+1)×
44
45
,
=45×
44
45
+1×
44
45
,
=44+
44
45
,
=44
44
45
;

(2)
4
5
-(
2
7
-
1
5
)÷
1
4
,
=
4
5
-
3
35
÷
1
4
,
=
4
5
-
12
35
,
=
16
35
;

(3)90×
4
91
,
=(91-1)×
4
91
,
=91×
4
91
-1×
4
91
,
=4-
4
91
,
=3
87
91
;

(4)
5
36
÷[(
1
2
-
1
6
)×
5
9
],
=
5
36
÷[
1
3
×
5
9
],
=
5
36
÷
5
27
,
=
3
4
;

(5)
8
17
÷23+
1
23
×
9
17
,
=
8
17
×
1
23
+
1
23
×
9
17
,
=(
8
17
+
9
17
)×
1
23

=1×
1
23
,
=
1
23
;

(6)
3
4
×
2
5
+
3
4
×0.6,
=
3
4
×(
2
5
+0.6),
=
3
4
×1,
=
3
4
.
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