题目内容

脱式计算,能简算的要简算.
(1)(
5
6
+
7
12
+
3
8
)÷
1
48

(2)[1-(
1
2
+
1
3
)×
1
5
5
6

(3)6.46-(5.37-3.54)
(4)5.58-
3
5
+5.42-
2
5
(1)(
5
6
+
7
12
+
3
8
)÷
1
48

=(
5
6
+
7
12
+
3
8
)×48,
=
5
6
×48+
7
12
×48+
3
8
×48,
=40+28+18,
=86;

(2)[1-(
1
2
+
1
3
)×
1
5
5
6

=[1-(
3
6
+
2
6
)×
1
5
6
5

=[1-
5
6
×
1
5
6
5

=[1-
1
6
6
5

=
5
6
×
6
5

=1;

(3)6.46-(5.37-3.54),
=6.46-5.37+3.54,
=(6.46+3.54)-5.37,
=10-5.37,
=4.63;

(4)5.58-
3
5
+5.42-
2
5

=(5.58+5.42)-(
3
5
+
2
5
),
=11-1,
=10.
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