Question

Tính nhanh 1) 1/5+3/17-4/3+(4/5-3/17+1/15) 2) (5/8-4/13+3/2)-(5/8+9/3)

Answer 1

1)     \(\frac{1}{5}+\frac{3}{17}-\frac{4}{3}+\left(\frac{4}{5}-\frac{3}{17}+\frac{1}{15}\right)\)

\(=\frac{1}{5}+\frac{3}{17}-\frac{4}{3}+\frac{4}{5}-\frac{3}{17}+\frac{1}{15}\)

\(=\left(\frac{1}{5}+\frac{4}{5}\right)+\left(\frac{3}{17}-\frac{3}{17}\right)-\left(\frac{4}{3}-\frac{1}{15}\right)\)

\(=1+0-\frac{19}{15}\)

\(=-\frac{14}{15}\)

Answer 2

MÌNH

NHẦM

CHÚT

NHA

KẾT QUẢ CUỐI CÙNG LÀ:

\(-\frac{4}{15}\)

sorry!!!

Answer 3

còn câu 2

Answer 4

\(\frac{1}{5}-\frac{3}{17}-\frac{4}{3}+\left(\frac{4}{5}-\frac{3}{17}-\frac{1}{15}\right)\)

\(=\frac{1}{5}-\frac{3}{17}-\frac{4}{3}-\frac{4}{5}-\frac{3}{17}-\frac{1}{15}\)

\(=\left(\frac{1}{5}+\frac{4}{5}\right)-\left(\frac{3}{17}-\frac{3}{17}\right)-\left(\frac{4}{3}-\frac{1}{15}\right)\)

\(=1+0-\frac{19}{15}\)

\(=-\frac{14}{15}\)