如题所述
解ï¼åå¼=99xï¼101+77ï¼+99x2-20
=99xï¼188+2ï¼-20
=ï¼100-1ï¼x190-20
=19000-190-20
=19000-210
=18790
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=99xï¼188+2ï¼-20
=ï¼100-1ï¼x190-20
=19000-190-20
=19000-210
=18790
åæï¼ä¸»è¦èå¯æåå ¬å å¼åæåæ³ã
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第1个回答 2016-07-23
99x101+99x77+178
=99x101+99x77+99x2 -20
=99x(101+77+2) -20
=99x180 -20
=(100-1)x180 -20
=18000-180-20
=18000-200
=17800
=99x101+99x77+99x2 -20
=99x(101+77+2) -20
=99x180 -20
=(100-1)x180 -20
=18000-180-20
=18000-200
=17800
第2个回答 2016-07-23
99*(101+77)+178
=99*178+178
=178*(99+1)
=178*100
=17800
=99*178+178
=178*(99+1)
=178*100
=17800
第3个回答 2016-07-23
99*101+99*77+178
=99*(101+77)+178
=99*178+178
=178*(99+1)
=178*100
=17800
=99*(101+77)+178
=99*178+178
=178*(99+1)
=178*100
=17800
第4个回答 2016-07-23
99*101+99*77+178
=99x(101+77+2)
=99x180
=100x180-180
=18000-180
=17820追答
=99x(101+77+2)
=99x180
=100x180-180
=18000-180
=17820追答
做错了,应该是:
99*101+99*77+178
=99x(101+77)+178
=99x178+178
=(99+1)x178
=100x178
=17800
第5个回答 2016-07-23
99*101+99*77+178
=99*(101+77)+178
=99*178+178
=178*(99+1)
=178*100
=17800
=99*(101+77)+178
=99*178+178
=178*(99+1)
=178*100
=17800