1,4,9,16

ai đúng mình tích

1x1=1

2x2=4

3x3=9

4x4=16

5x5=25

6x6=36

7x7=49

8x8=64

9x9=81

10x10=100

11x11=121

12x12=144

13x13=169

14x14=196

15x15=225

16x16=256

17x17=289

18x18=324

19x19=361

20x20=400

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

Trả lời

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

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

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

                              \(=1\)

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

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

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

Bài làm

      \(\frac{16x17-5}{16x16+11}\)

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

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

\(=1\)

# Học tốt #

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

\(=\frac{16.16+16-5}{16.16+11}\)

\(=\frac{16.16+11}{16.16+11}\)

\(=1\)

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

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

\(=\frac{16\cdot17-5}{16\cdot17-5}\)

\(=1\)

mk ko copy của Trần Thùy Dung nhé

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

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

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

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

\(=1\)

(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!)

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