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脱式计算.(能简算的要简算)(1)37.5%×365+58÷1365(2)(12+17-25+314)×70(3)0.75×65+34×34+75%(4)25×32×77×125.

题目详情
脱式计算.(能简算的要简算)
(1)37.5%×365+
5
8
÷
1
365
            
(2)(
1
2
+
1
7
-
2
5
+
3
14
)×70
(3)0.75×65+
3
4
×34+75%             
(4)25×32×77×125.
▼优质解答
答案和解析
(1)37.5%×365+
5
8
÷
1
365

=37.5%×365+
5
8
×365
=(37.5%+
5
8
)×365
=1×365
=365;

(2)(
1
2
+
1
7
-
2
5
+
3
14
)×70
=
1
2
×70+
1
7
×70-
2
5
×70+
3
14
×70
=35+10-28+15
=45-28+15
=17+15
=32;

(3)0.75×65+
3
4
×34+75%
=0.75×65+0.75×34+0.75
=0.75×(65+34+1)
=0.75×100
=75;

(4)25×32×77×125
=25×(4×8)×77×125
=(25×4)×(125×8)×77
=100×1000×77
=100000×77
=7700000.