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}
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![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}](/uploads/image/z/13049375-23-5.jpg?t=4%E9%81%93%E8%AE%A1%E7%AE%97+%E6%88%91%E5%AE%9E%E5%9C%A8%E7%AE%97%E4%B8%8D%E5%87%BA%E6%9D%A5%E4%BA%86%E3%80%901%E3%80%911999%2A%285.22%2A1045%2B523%2F100%29%2F%285.23%2A1045-5.22%29%5B2%5D1%2F4%2A%284.85%2F5%2F8-3.6%2B6.15%2A3.6%29%2B%5B5.5-1.75%2A%285%2F3%2B19%2F21%29%5D%5B3%5D100-%2815%2F4%2A12%2F5-5%2F3%2F13%2F5%29%2F39%2F8%2A21%2F4%5B4%5D23%2F9%2A%7B%28113%2F12-31%2F4%29%2F45%2F2%2B100%2F21%2A7%2F12%7D)
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}
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}
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}
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!
1. 1999*(5.22*1045+5.23)/(5.22*1045+10.45-5.22)=1999*1=1999
用计算机算嘛
1.原式=1999*(5454.9+5.23)/(5465.35-5.22)
=1999*5460.13/5460.13
=10914799.87/5460.13
=1999
或原式=1999*(5.22*1045+5.22+0.01)/(5.22*1045+0.01*1045-5.22)
=1999*...
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1.原式=1999*(5454.9+5.23)/(5465.35-5.22)
=1999*5460.13/5460.13
=10914799.87/5460.13
=1999
或原式=1999*(5.22*1045+5.22+0.01)/(5.22*1045+0.01*1045-5.22)
=1999*[5.22*(1045+1)+0.01]/[5.22(1045-1)+0.01*1045]
=1999*[5.22*(1045+1)+0.01]/[5.22 (1045+1)+10.45-5.22*2]
=1999*{[5.22*(1045+1)+0.01]/[5.22*(1045+1)+0.01]}
=1999*1
=1999
2.3.4题都是分数,写在纸上学分就好了
收起