Question

Tính hộ mình nhé:))!

0,01 + 0,02 + 0,03 ... 0,48 + 0,49

Answer 1

\(0,01+0,02+...+0,49\\=\dfrac{1}{100}\left(1+2+...+49\right)\\ =\dfrac{1}{100}\left[\left(49+1\right).49:2\right]\\ =\dfrac{1}{100}.1225\\ =12,25\)