问题 解答题
脱式计算,能简算的要简算.
(1)250×16-48048÷24 
(2)18÷1.5-0.5×0.3 (3)25×1.25×32
(4)5.58-
3
5
+5.42-
2
5
(5)(
5
6
+
7
12
+
3
8
)÷
1
48
(6)[1-(
1
2
+
1
3
)×
1
5
5
6
答案

(1)250×16-48048÷24,

=4000-2002,

=1998;

(2)18÷1.5-0.5×0.3,

=12-0.15,

=11.85;

(3)25×1.25×32,

=25×1.25×4×8,

=(25×4)×(1.25×8),

=100×10,

=1000;

(4)5.58-

3
5
+5.42-
2
5

=(5.58+5.42)-(

3
5
+
2
5
),

=11-1,

=10;

(5)(

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,

=68+18,

=86;

(6)[1-(

1
2
+
1
3
)×
1
5
5
6

=[1-

5
6
×
1
5
5
6

=[1-

1
6
]÷
5
6

=

5
6
÷
5
6

=1.

多项选择题
单项选择题