\(\frac{16.17-5}{16.16+11}\)

\(=\frac{17-5}{16+11}\)

\(=\frac{12}{27}\)

Bài làm

      \(\frac{16x17-5}{16x16+11}\)

\(=\frac{272-5}{256+11}\)

\(=\frac{267}{267}\)

\(=1\)

# Học tốt #

\(\frac{16.17-5}{16.16+11}\)

\(=\frac{16.\left(16+1\right)-5}{16^2+11}\)

\(=\frac{16^2+16-5}{16^2+11}\)

\(=\frac{16^2+11}{16^2+11}\)

\(=1\)

(Nhớ k cho mình với nhé!)

 \(\frac{16x17-5}{16x16+11}\)

=\(\frac{16x\left(16+1\right)-5}{16x16+11}\)

=\(\frac{16x16+16x1-5}{16x16+11}\)

= \(\frac{16x16+11}{16x16+11}\)

= 1 ( vì TS = MS )

\(\frac{16.17-5}{16.16+11}\)

\(=\frac{16.\left(16+1\right)-5}{16^2+11}\)

\(=\frac{16^2+16-5}{16^2+11}\)

\(=\frac{16^2+11}{16^2+11}=1\)

 (Nhớ k cho mình với nhé!)

\(\frac{16\cdot17-5}{16\cdot16+11}=1\)

\(\frac{16\times17-5}{16\times16+11}=\frac{16\times\left(16+1\right)-5}{16\times16+11}=\frac{16\times16+16-5}{16\times16+11}=\frac{16\times16+11}{16\times16+11}=1\)

Trả lời

\(\frac{16\times17-5}{16\times16+11}=\frac{16\times\left(16+1\right)-5}{16\times16+11}\)

                             \(=\frac{16\times16+16-5}{16\times16+11}\)

                             \(=\frac{16\times16+11}{16\times16+11}\)

                              \(=1\)

\(\frac{16x17-5}{16x16+11}=\frac{16x16+16-5}{16x16+11}=1\)

\(\frac{4}{3x7}+\frac{5}{7x12}+\frac{1}{12x13}+....+\frac{3}{20x23}\)

=\(\frac{1}{3}-\frac{1}{7}+\frac{1}{7}-\frac{1}{12}+\frac{1}{12}-\frac{1}{13}+...+\frac{1}{20}-\frac{1}{23}\)

=\(\frac{1}{3}-\frac{1}{23}=\frac{20}{69}\)

a) \(\frac{16\cdot17-5}{16\cdot16+11}\)

= \(\frac{16\cdot16+16-5}{16\cdot16+11}\)

= \(\frac{16\cdot16+11}{16\cdot16+11}=1\)

\(\dfrac{5}{9}\times\dfrac{5}{11}+\dfrac{5}{11}\times\dfrac{4}{9}\)
\(=\left(\dfrac{5}{9}+\dfrac{4}{9}\right)\times\dfrac{5}{11}\)
\(=1\times\dfrac{5}{11}\)
\(=\dfrac{5}{11}\)
#NoSimp

    \(\dfrac{5}{9}\) \(\times\) \(\dfrac{5}{11}\) + \(\dfrac{5}{11}\) \(\times\) \(\dfrac{4}{9}\)

=   \(\dfrac{5}{11}\) \(\times\) ( \(\dfrac{5}{9}\) + \(\dfrac{4}{9}\))

= \(\dfrac{5}{11}\) \(\times\) \(\dfrac{9}{9}\)

= \(\dfrac{5}{11}\)

    5995​ $\times$ 511115​ + 511115​ $\times$ 4994​

=   511115​ $\times$ ( 5995​ + 4994​)

= 511115​ $\times$ 9999​

= 511115​

giúp mk với

(23/11+10/11) + 1/5

= 3 + 1/5 

= 16/5

    \(\dfrac{23}{11}+\left(\dfrac{1}{5}+\dfrac{10}{11}\right)\)

\(=\dfrac{23}{11}+\dfrac{1}{5}+\dfrac{10}{11}\)

\(=\left(\dfrac{23}{11}+\dfrac{10}{11}\right)+\dfrac{1}{5}\)

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

\(=\dfrac{15}{5}+\dfrac{1}{5}\) \(=\dfrac{15+1}{5}=\dfrac{16}{5}\)

7/11 : 3/5 + 4/11 : 3/5

= (7/11 + 4/11) : 3/5

=1:3/5=5/3

\(\left(\dfrac{7}{11}+\dfrac{4}{11}\right):\dfrac{3}{5}=\dfrac{11}{11}:\dfrac{3}{5}=\dfrac{1}{1}:\dfrac{3}{5}=\dfrac{1}{1}\times\dfrac{5}{3}=\dfrac{5}{3}\)

= (7/11 + 4/11) : 3/5

=1:3/5=5/3