99*0.55*2簡算

99*0.55*2簡算


99*0.55*2
=99*1.1
=(100-1)*1.1
=100*1.1-1.1
=110-1.1
=108.9
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下麵各題簡算65*25*4
86*16-86*6 [35+(184-119)]*13 765/[(12+5)*5]快


65×(25×4)=65×100=6500
86×(16-6)=86×10=860
[(35+184)-119]×13=(219-119)×13=200×13=2600
765÷5÷17=153÷17=9



2÷(1/27-1/36)×6怎樣簡算?


2×6÷(1/27-1/36)
=12÷1/108
=12×108
=12×(100+8)
=1200+96
=1296



8160÷24-36×25簡算


先算除,乘後算減法