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用简便算法计算下面各题35+27+65872-481-2191234+700+30026+(89+74)350+195+105+850147+89+53+11435-(135+189)369-142-58282+63+37

题目详情
用简便算法计算下面各题
35+27+65             
872-481-219             1234+700+300
26+(89+74) 350+195+105+850       147+89+53+11
435-(135+189) 369-142-58          282+63+37
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答案和解析
(1)35+27+65   
=35+65+27
=100+27
=127

(2)872-481-219            
=872-(481+219)
=872-700
=172

(3)1234+700+300
=1234+(700+300)
=1234+1000
=2234

(4)26+(89+74)
=26+74+89
=100+89
=189

(5)350+195+105+850      
=350+850+(195+105)
=1200+300
=1500

(6)147+89+53+11
=147+53+(89+11)
=200+100
=300

(7)435-(135+189)
=435-135-189
=300-189
=111

(8)369-142-58
=369-(142+58)
=369-200
=169

(9)282+63+37
=282+(63+37)
=282+100
=382