简便运算:27×46÷79÷46×79÷27 19961997×19971996-19961996×19971997 1994﹢199.4﹢19.94﹢1.9949.1﹢9.2﹢9.3﹢9.4﹢……﹢10.7﹢10.8﹢10.9 89﹢899﹢8999﹢89999﹢899999 急要
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简便运算:27×46÷79÷46×79÷27 19961997×19971996-19961996×19971997 1994﹢199.4﹢19.94﹢1.9949.1﹢9.2﹢9.3﹢9.4﹢……﹢10.7﹢10.8﹢10.9 89﹢899﹢8999﹢89999﹢899999 急要
简便运算:27×46÷79÷46×79÷27 19961997×19971996-19961996×19971997 1994﹢199.4﹢19.94﹢1.994
9.1﹢9.2﹢9.3﹢9.4﹢……﹢10.7﹢10.8﹢10.9 89﹢899﹢8999﹢89999﹢899999 急要
简便运算:27×46÷79÷46×79÷27 19961997×19971996-19961996×19971997 1994﹢199.4﹢19.94﹢1.9949.1﹢9.2﹢9.3﹢9.4﹢……﹢10.7﹢10.8﹢10.9 89﹢899﹢8999﹢89999﹢899999 急要
简便运算:
27×46÷79÷46×79÷27
=27*46/(79*46)*79/27
=27/79*79/27
=1
19961997×19971996-19961996×19971997
=19961996*19971996+19971996-19961996*(19961996+10001)
=19971996-19961996*10001
=19971996-199619960000-19961996
=10000-199619960000
=-199619950000
1994﹢199.4﹢19.94﹢1.994
=1.994*(1000+100+10+1)
=1.994*1111
=2215.334
9.1﹢9.2﹢9.3﹢9.4﹢……﹢10.7﹢10.8﹢10.9
=(9.1+10.9)*19/2
=20*19/2
=190
89﹢899﹢8999﹢89999﹢899999
=80+800+8000+80000+800000+9+99+999+9999+99999
=888880+111110-5
=999990-5
=999985
1
0
2215.334
9*9+(0.1+0.9)*9/2+(0+0.9)*10/2+10*10
=81+4.5+4.5+100
=190
=(90-1)+(900-1)+(9000-1)+(90000-1)+(900000-1)
=999999-5
=999994
27×46÷79÷46×79÷27
=(27÷27)×(46÷46)×(79÷79)=1
19961997×19971996-19961996×19971997
=19961997×(19971997-1)-19961996×19971997
=19961997×19971997-19961997×1-19961996×19971997
=199...
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27×46÷79÷46×79÷27
=(27÷27)×(46÷46)×(79÷79)=1
19961997×19971996-19961996×19971997
=19961997×(19971997-1)-19961996×19971997
=19961997×19971997-19961997×1-19961996×19971997
=19961997×19971997-(19961996+1)×19971997
=0
1994﹢199.4﹢19.94﹢1.994
=1994×1﹢1994×0.1﹢1994×0.01﹢1994×0.001
=1994×(1﹢0.1+0.01+0.001)
=1994×1.111
=2215.334
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