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能简算的要简算(13.7×0.25)×42.65×1.7+1.35×1.720.01×83+1.7×200.13.68×[1÷(2.1-2.09)]2.3+3.91÷(22-19.7)

题目详情
能简算的要简算
(13.7×0.25)×4       
2.65×1.7+1.35×1.7        
20.01×83+1.7×200.1
3.68×[1÷(2.1-2.09)]
2.3+3.91÷(22-19.7)
▼优质解答
答案和解析
(1)(13.7×0.25)×4
=13.7×(0.25×4)
=13.7×1
=13.7;
(2)2.65×1.7+1.35×1.7
=(2.65+1.35)×1.7
=4×1.7
=6.8;
(3)20.01×83+1.7×200.1
=20.01×83+17×20.01
=(83+17)×20.01
=100×20.01
=2001;
(4)3.68×[1÷(2.1-2.09)]
=3.68×(1÷0.01)
=3.68×100
=368;
(5)2.3+3.91÷(22-19.7)
=2.3+3.91÷2.3
=2.3+1.7
=4.