问题 解答题
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.
答案

(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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