78.6-0.786×25+75%×21.4简便计算

（78.6-0.786*25+0.75*21.4)除15*2001＝（0.786×100-0.786×25+75×0.214）÷15×2001＝（0.786×75+75×0.214）÷15×2001=

(78.6-0.786*25+75%*21.4)*1997=(78.6×1-78.6×0.25+0.75×21.4)×1997=[78.6×(1-0.25)+0.75×21.4]×1997=(78.6

(78.6-0.786*25+0.75*21.4)/15*2003={[78.6*(1-0.25)]+0.75*21.4}/15*2003=(78.6*0.75+0.75*21.4)/15*2003=

=78.6-78.6*0.25+75%*21.4=78.6*0.75++75%*21.4=(78.6+21.4)*0.75=75

原式=(78.6*0.75+0.75*21.4)/15*1997=75/15*1997=5*1997=9985

(78.6-0.786*25+0.75*21.4)/15*1999=(78.6-78.6*0.25+0.75*21.4)/15*1999=[78.6(1-0.25)+0.75*21.4]/15*199

原式=78.6-78.6*0.25+0.75*21.4　　=78.6（1-0.25）+0.75*21.4　　=78.6*0.75+21.4*0.75　　=0.75（78.6+21.4）　　=0.75*

(78.6-0.786×2.5＋0.75×21.4)÷15×1997=（393/5-393/500*5/2+3/4*107/5）/15*1997=（393/5-393/200+321/20）/15*1

（78.6—0.786×25+75%×21.4）÷15×2001=（78.6—78.6×0.25+75%×21.4）÷15×2001=（78.6×0.75+75%×21.4）÷15×2001=（78.

24.7×16.5+24.7×78.6+24.7×4.9=24.7×(16.5+78.6+4.9)=24.7×100=24703200÷125÷8=3200÷(125×8)=3200÷1000=3.2

78.6+0.214*25+75%*21.4=78.6+0.214*25+0.75x100x0.214=78.6+0.214x(25+75)=78.6+0.214x100=78.6+21.4=100

（78.6-0.786×25十75%×21.4）÷15×1997=（78.6-19.65+0.75×21.4）÷15×（2000-3）=（78.6-19.65+16.05）÷15×（2000-3）=（

（78.6-0.786×25+75％×21.4）÷2001=（78.6-78.6×0.25+75％×21.4）÷2001=（78.6×0.75+0.75×21.4）÷2001=（(78.6+21.4）

（78.6-0.786×25十75%×21.4）÷15×2011=（78.6-78.6×0.25+75%×21.4）÷15×2011，=[（1-0.25）×78.6+0.75×21.4]÷15×201

原式=78.6-0.786*25+四分之三*21.4)/300（78.6-0.786*100/4+四分之三*21.4）/300（78.6-78.6*四分之1+四分之三*21.4）/300[（78.6+

(78.6-0.786*25+75%*21.4)/15*2011=（78.6-78.6x0.25+0.75x21.4）÷15x2011=[78.6x(1-0.25)+0.75x21.4]÷15x201

(78.6-0.786乘以25+75%乘以21.4）除以15乘2001=(78.6乘以75%+75%乘以21.4）除以15乘2001=(78.6+21.4)乘以75%除以15乘2001=10005

计算：（1）(78.6－0.786×25＋75%×21.4)÷15×2001（先做括号里的乘法）=(78.6－19.65＋16.05)÷15×2001（再做括号里的加减法）=75÷15×2001（再做

（78.6-0.786×25+75%×21.4）÷15×1997=[78.6-78.6×0.25+75%×（100-78.2）]÷15×1997；=（78.6-78.6×0.25+0.75×100-0