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(2014•泸州模拟)怎样简便就怎样计算56.73×259-56.73×159;(211-112)×11×12;138×114+23.3×(2-75%)-125%×38+(1+0.25)×28.7;573+697×572573×697−124+363636727272.

题目详情
(2014•泸州模拟)怎样简便就怎样计算
56.73×259-56.73×159;                
2
11
-
1
12
)×11×12;
138×1
1
4
+23.3×(2-75%)-125%×38+(1+0.25)×28.7;    
573+697×572
573×697−124
+
363636
727272
▼优质解答
答案和解析
①56.73×259-56.73×159
=56.73×(259-159)
=56.73×100
=5673

②(
2
11
-
1
12
)×11×12
=
2
11
×11×12-
1
12
×11×12
=24-11
=13

③138×1
1
4
+23.3×(2-75%)-125%×38+(1+0.25)×28.7
=
5
4
×(138+23.3-38+28.7)
=
5
4
×(100+52)
=190

573+697×572
573×697−124
+
363636
727272

=
573+697×(573−1)
573×697−124
+
363636
363636×2

=
573×697+573−697
573×697−124
+
1
2

=
573×697−124
573×697−124
+
1
2

=1+0.5
=1.5