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神机妙算细又巧.(能用简便方法的用简便方法计算)18÷(12-13) (0.75-316)×(29+13) 2-613÷926+23 710×49+49×210 35÷[(15+13)÷29] (23

编辑:chaxungu时间:2026-04-27 13:18:16分类:小学数学题库

神机妙算细又巧.(能用简便方法的用简便方法计算)
18÷(
1
2
-
1
3
)
(0.75-
3
16
)×(
2
9
+
1
3
)
2-
6
13
÷
9
26
+
2
3
7
10
×
4
9
+
4
9
×
2
10
3
5
÷[(
1
5
+
1
3
)÷
2
9
]
(
2
3
-
1
2
+
1
6
)÷
1
48
.
(1)18÷(
1
2
-
1
3
),
=18÷
1
6
,
=18×6,
=108;

(2)(0.75-
3
16
)×(
2
9
+
1
3
),
=(
3
4
-
3
16
)×(
2
9
+
1
3
),
=
9
16
×
5
9
,
=
5
16
;

(3)2-
6
13
÷
9
26
+
2
3
,
=2-
6
13
×
26
9
+
2
3
,
=2-
4
3
+
2
3
,
=2-(
4
3
-
2
3
),
=2-
2
3
,
=1
1
3
;

(4)
7
10
×
4
9
+
4
9
×
2
10
,
=(
7
10
+
2
10
)×
4
9
,
=
9
10
×
4
9
,
=
2
5
;

(5)
3
5
÷[(
1
5
+
1
3
)÷
2
9
]
=
3
5
÷[
8
15
÷
2
9
],
=
3
5
÷[
8
15
×
9
2
],
=
3
5
÷
12
5
,
=
3
5
×
5
12
,
=
1
4
;

(6)(
2
3
-
1
2
+
1
6
)÷
1
48
,
=(
2
3
-
1
2
+
1
6
)×48,
=
2
3
×48-
1
2
×48+
1
6
×48,
=32-24+8,
=16.