4道计算我实在算不出来了11999*(5.22*1045+523/100)/(5.23*1045-5.22)[2]1/4*(4.85/5/8-3.6+6.15*3.6)+[5.5-1.75*(5/3+19/21)][3]100-(15/4*12/5-5/3/13/5)/39/8*21/4[4]23/9*{(113/12-31/4)/45/2+100/21*7/12}

Question

4道计算 我实在算不出来了
【1】1999*(5.22*1045+523/100)/(5.23*1045-5.22)
[2]1/4*(4.85/5/8-3.6+6.15*3.6)+[5.5-1.75*(5/3+19/21)]
[3]100-(15/4*12/5-5/3/13/5)/39/8*21/4
[4]23/9*{(113/12-31/4)/45/2+100/21*7/12}

Answer 1

1、1999*(5.22*1045+523/100)/(5.23*1045-5.22)=1999*(522/100*1045+523/100)/(523/100*1045-522/100)=1999*(522*1045+523)/(523*1045-522)=1999*(523*1045-1045+523)/(1045*523-522)=1999*(523*1045-522)/(523*1045-522)=1999
后几题您把分数线画画清楚,估计照这个思路就没问题了!