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计算(要灵活使用运算律哟).58×1110+38÷1011=11101110;7.28-3.14+1.72-2.86=;(112+19-16)×36=;[(5-4.75)÷1+2.7]×0.4=.

题目详情
计算(要灵活使用运算律哟).
5
8
×
11
10
+
3
8
÷
10
11
=
11
10
11
10

7.28-3.14+1.72-2.86=______;
1
12
+
1
9
-
1
6
)×36=______;
[(5-4.75)÷1+2.7]×0.4=______.
▼优质解答
答案和解析
(1)
5
8
×
11
10
+
3
8
÷
10
11

=
5
8
×
11
10
+
3
8
×
11
10

=(
5
8
+
3
8
)×
11
10

=1×
11
10

=
11
10


(2)7.28-3.14+1.72-2.86,
=(7.28+1.72)-(3.14+2.86),
=9-6,
=3;

(3)(
1
12
+
1
9
-
1
6
)×36,
=
1
12
×36+
1
9
×36-
1
6
×36,
=3+4-6,
=1;

(4)[(5-4.75)÷1+2.7]×0.4,
=[0.25÷1+2.7]×0.4,
=[0.25+2.7]×0.4,
=0.25×0.4+2.7×0.4,
=0.1+1.08,
=1.18.
故答案为:
11
10
,3,1.18.