2138除以2138又2138\2139+1除以2140
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![2138除以2138又2138\2139+1除以2140](/uploads/image/z/14390353-1-3.jpg?t=2138%E9%99%A4%E4%BB%A52138%E5%8F%882138%5C2139%2B1%E9%99%A4%E4%BB%A52140)
2138除以2138又2138\2139+1除以2140
2138除以2138又2138\2139+1除以2140
2138除以2138又2138\2139+1除以2140
2138除以2138又2138\2139+1除以2140
2138 ÷ (2138+2138/2139) + 1÷2140
= 2138 ÷ {2138×(1+1/2139) } + 1÷2140
= 1 ÷ (1+1/2139) + 1÷2140
= 1 ÷ (2140/2139) + 1÷2140
= 2139/2140 + 1/2140
= 1