题目内容

计算.(能简算的要简算)
14.4÷0.125÷8
1.5×
4
5
+0.8×5.5+2×
4
5
920÷40+23×99
5
9
+
3
11
+
4
9
+
8
11
1005÷[42×(
5
6
-
5
7
)]
35÷[1-(
1
5
+
1
7
)]
848-80÷16×2729×
17
131
+
29
131
×114.

(1)14.4÷0.125÷8,
=14.4÷(0.125×8),
=14.4÷1,
=14.4;

(2)1.5×
4
5
+0.8×5.5+2×
4
5

=1.5×0.8+0.8×5.5+2×0.8,
=(1.5+5.5+2)×0.8,
=9×0.8,
=7.2;

(3)920÷40+23×99,
=23+23×99,
=23×(1+99),
=23×100,
=2300;

(4)
5
9
+
3
11
+
4
9
+
8
11

=(
5
9
+
4
9
)+(
3
11
+
8
11
),
=1+1,
=2;

(5)1005÷[42×(
5
6
-
5
7
)],
=1005÷[42×
5
6
-42×
5
7
)],
=1005÷[35-30],
=1005÷5,
=201;

(6)35÷[1-(
1
5
+
1
7
)],
=35÷[1-
12
35
],
=35÷
23
35

=35×
35
23

=
1225
23


(7)848-80÷16×27,
=848-5×27,
=848-135,
=713;

(8)29×
17
131
+
29
131
×114,
=17×
29
131
+
29
131
×114,
=
29
131
×(17+114),
=
29
131
×131,
=29.
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