Question

TÍNH BẰNG CÁCH THUẬN TIỆN NHẤT:

12/25+3/5+13/25

=

 

Answer 1

Tính thuận tiện :

\(\frac{12}{25}+\frac{3}{5}+\frac{13}{25}\)

= \(\frac{12}{25}+\frac{13}{25}+\frac{3}{5}\)

= \(\frac{25}{25}+\frac{3}{5}\)

= \(1+\frac{3}{5}\)

= \(\frac{5}{5}+\frac{3}{5}\)

= \(\frac{8}{5}\)

Answer 2

\(\frac{12}{25}+\frac{3}{5}+\frac{13}{25}\)

\(=\left(\frac{12}{25}+\frac{13}{25}\right)+\frac{3}{5}\)

\(=\frac{25}{25}+\frac{3}{5}\)

\(=1+\frac{3}{5}=\frac{8}{5}\)

Answer 3

\(\frac{12}{25}+\frac{3}{5}+\frac{13}{25}\)

\(=\left(\frac{12}{25}+\frac{13}{25}\right)+\frac{3}{5}\)

\(=\frac{25}{25}+\frac{3}{5}\)

\(=1+\frac{3}{5}\)

\(=\frac{8}{5}\)

Answer 4

\(\frac{12}{25}+\frac{3}{5}+\frac{13}{25}\)

\(=\left(\frac{12}{25}+\frac{13}{25}\right)+\frac{3}{5}\)

\(=1+\frac{3}{5}\)

\(=\frac{5}{5}+\frac{3}{5}=\frac{8}{5}\)

Answer 5

\(\frac{12}{25}+\frac{3}{5}+\frac{13}{25}\)

\(=\left(\frac{12}{25}+\frac{13}{25}\right)+\frac{3}{5}\)

\(=\frac{25}{25}+\frac{3}{5}\)

\(=1+\frac{3}{5}\)

\(=\frac{5}{5}+\frac{3}{5}\)

\(=\frac{8}{5}\)