(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!](/uploads/image/z/15451836-60-6.jpg?t=%28999%2F1000%29%2A%281%2F100%29%2B%28111%2F1000%29%2A%2827%2F100%29%E7%AE%80%E7%AE%97%21)
999/1000x1/100+111/1000x27/100
=999/1000x1/100+111/1000x9x3/100
=999/1000x(1/100+3/100)
=999/1000x1/25
=999/25000
=999/1000x1/100+111/1000x9x3/100
=999/1000x(1/100+3/100)
=999/1000x1/25
=999/25000
1-1/10-11/100-111/1000-1111/10000=
(1/10+1/100+1/1000+1/10000)/(1/100+1/1000)简算
111+222+333+.+999分之100+200+300...+900简算
-99/100 -999/1000 谁大?
3又10分之1+3又100分之11+3又1000分之111+3又10000分之1111简算
9/10+99/100+999/1000+.+99999999/100000000 =1-1/10+1-1/100+.+
9/10+99/100+999/1000+9999/1000+99999/10000
1000+1+100+10
1+10+11+100+111+1000+1111+10000+11111+100000+111111=
1 10 11 100 101 110 111 1000 1001 1010 1011 ..第N位怎么求
1 10 11 100 101 111 1000 1001 1011 1111 10000 10001 10011 10
1+.+999+1000=?