以下三道题该怎样巧算？要求过程。
1847-64-136+628-19284993+3996+5997+8481348-234-131-424+1405-576+2234+1095-826-1074+15...
1847-64-136+628-1928
4993+3996+5997+848
1348-234-131-424+1405-576+2234+1095-826-1074+1599-169-1048+2201 展开
4993+3996+5997+848
1348-234-131-424+1405-576+2234+1095-826-1074+1599-169-1048+2201 展开
2个回答
展开全部
1847-64-136+628-1928=1847-(64+136)-(1928-628)=1847-200-1300=347
4993+3996+5997+848=(5000-7)+(4000-4)+(6000-3)+848=15000+848-14=15834
1348-234-131-424+1405-576+2234+1095-826-1074+1599-169-1048+2201
=(1599+2201)+(1405+1095)+(1348-1048)+(2234-234)-(169+131)-（424+576）-（826+1074）=3800+2500+300+2000-300-1000-1900=6400
4993+3996+5997+848=(5000-7)+(4000-4)+(6000-3)+848=15000+848-14=15834
1348-234-131-424+1405-576+2234+1095-826-1074+1599-169-1048+2201
=(1599+2201)+(1405+1095)+(1348-1048)+(2234-234)-(169+131)-（424+576）-（826+1074）=3800+2500+300+2000-300-1000-1900=6400
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展开全部
1847-64-136+628-1928
=1847-(64+136)-(1928-628)
=1847-200-1300
=347
4993+3996+5997+848
=4993+3996+5997+848+7+4+3-14
=(4993+7)+(3996+4)+(5997+3)+848-14
=5000+4000+6000+834
=15000+834
=15834
1348-234-131-424+1405-576+2234+1095-826-1074+1599-169-1048+2201
=(1348-1048)-(424+576)+(1405+1095)+(2234-234)-(131+169)-(826+1074)+(1599+2201)
=300-1000+2500+2000-300-1900+3800
=5400
=1847-(64+136)-(1928-628)
=1847-200-1300
=347
4993+3996+5997+848
=4993+3996+5997+848+7+4+3-14
=(4993+7)+(3996+4)+(5997+3)+848-14
=5000+4000+6000+834
=15000+834
=15834
1348-234-131-424+1405-576+2234+1095-826-1074+1599-169-1048+2201
=(1348-1048)-(424+576)+(1405+1095)+(2234-234)-(131+169)-(826+1074)+(1599+2201)
=300-1000+2500+2000-300-1900+3800
=5400
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