1(1/100)+2(1/100)+3(1/100)+...+99(1/100)简算

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1(1/100)+2(1/100)+3(1/100)+...+99(1/100)简算

1(1/100)+2(1/100)+3(1/100)+...+99(1/100)简算
1(1/100)+2(1/100)+3(1/100)+...+99(1/100)简算

1(1/100)+2(1/100)+3(1/100)+...+99(1/100)简算
1(1/100)+2(1/100)+3(1/100)+...+99(1/100)
=(1/100)*(1+2+3+.+99)
=(1/100)*(1+99)*99/2
=(1/100)*100*99/2
=99/2

1(1/100)+2(1/100)+3(1/100)+...+99(1/100)简算
= (1+99) x 99/(2 x100)
= 99/2