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(2012•隆昌县一模)计算,能简算的要简算(1)375+450÷18×25(2)4.38×5.6+56.2×0.56(3)1110-14-34+910(4)415÷(139-23×56)

题目详情
(2012•隆昌县一模)
计算,能简算的要简算
(1)375+450÷18×25                          
(2)4.38×5.6+56.2×0.56
(3)
11
10
-
1
4
-
3
4
+
9
10
                            
(4)
4
15
÷(
13
9
-
2
3
×
5
6
▼优质解答
答案和解析
(1)375+450÷18×25,
=375+25×25,
=375+625,
=1000.

(2)4.38×5.6+56.2×0.56,
=4.38×5.6+5.62×5.6,
=(4.38+5.62)×5.6,
=10×5.6,
=56;

(3)
11
10
-
1
4
-
3
4
+
9
10

=(
11
10
+
9
10
)-(
1
4
+
3
4
),
=2-1,
=1;

(4)
4
15
÷(
13
9
-
2
3
×
5
6
),
=
4
15
÷(
13
9
-
5
9
),
=
4
15
÷
8
9

=
3
10