作业帮(999/1000)*(1/100)+(111/1000)*(27/100)简算!
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(999/1000)*(1/100)+(111/1000)*(27/100)简算!
(999/1000)*(1/100)+(111/1000)*(27/100)简算!
(999/1000)*(1/100)+(111/1000)*(27/100)简算!
999/1000x1/100+111/1000x27/100
=999/1000x1/100+111/1000x9x3/100
=999/1000x(1/100+3/100)
=999/1000x1/25
=999/25000