题目内容

递等式计算(能简便的要简便)
25.3×12-33.46÷0.35
3
8
+
5
6
)÷
1
24
2.5×13×0.4
8
9
÷[(
2
5
+
1
10
)×
3
4
]
9.34-(2.34+0.49)
4
5
+
4
5
×19.
(1)25.3×12-33.46÷0.35,
=303.6-95.6,
=208;
(2)(
3
8
+
5
6
)÷
1
24

=(
9
24
+
20
24
)÷
1
24

=
29
24
×24,
=29;
(3)2.5×13×0.4,
=(2.5×0.4)×13,
=1×13,
=13;
(4)
8
9
÷[(
2
5
+
1
10
)×
3
4
],
=
8
9
÷[(
4
10
+
1
10
)×
3
4
],
=
8
9
÷[
1
2
×
3
4
],
=
8
9
÷
3
8

=
8
9
×
8
3

=
64
27

(5)9.34-(2.34+0.49),
=(9.34-2.34)-0.49,
=7-0.49,
=6.51;
(6)
4
5
+
4
5
×19,
=(1+19)×
4
5

=20×
4
5

=16.
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