5 x 4 = 20

5 x 7 = 35

5 x 10 = 50

\(5\cdot4=20\)

\(5\cdot7=35\)

\(5\cdot10=50\)

5x4=20

5x7=35

5x10=50

x+10=100

    x  =  100-10

    x  =   90

tk nhé 

x + 10 = 100

x         = 100 - 10

x          = 90

thanks

x + 10 = 100

x  = 100 - 10 

x  = 90

mk nè

kb nha

nhớ k mk đó

chào bn

có mk nek, 

10² = 100

2¹⁰ = 1024

t mk nha m.n

10^2 = 100

2^10 = 1024

k cho mk nha

10²=100

2¹⁰=1034

\(K=\frac{10}{7.12}+\frac{10}{12.17}+\frac{10}{17.22}+...+\frac{10}{502.507}\)

\(\Leftrightarrow K=\frac{10}{5}\left(\frac{1}{7}-\frac{1}{12}+\frac{1}{12}-\frac{1}{17}+\frac{1}{17}-\frac{1}{22}+...+\frac{1}{502}-\frac{1}{507}\right)\)

\(\Leftrightarrow K=2\left(\frac{1}{7}-\frac{1}{507}\right)\)

\(\Leftrightarrow K=2\cdot\frac{500}{3549}\)

\(\Leftrightarrow K=\frac{1000}{3549}\)

5xK=5/7.12+5/12.17+..............+5/502.507

5xK=(1/7-1/12)+(1/12-1/17)+........+(1/502-1/507)

5xK=1/7-1/507

5xK=500/3549

K   =500/3549:5

K    =100/3549

10+10=20

đúng đấy

10+10 = 20

=20 k cho mk nha

10*11=110

11*12=132

12*13=156

13*14=182

14*15=210

15*16=240

10 x 11 = 110

11 x 12 = 132

12 x 13 = 156

13 x 14 = 182

14 x 15 = 210

15 x 16 = 240

Ai mk mk lại!

10 x 11=121

11 x 12=132

12 x 13=156

13 x 14=182

14 x 15=210

15 x 16=240

10+173-143 nha

120 đúngko bn

= 40 bn nhé

100 + 50 - 10 - 40 = 100

100+50-10-40=100

mình nha

= 100 bn nhé!

Kb nha!

CHÚC BẠN HỌC TỐT!