22 x 22 = 22 x (2 + 1 + 19) = 22 x 2 + 22 + 22 x 19

                                  Vậy chữ số cần tìm là 19.

22 * 22 = 22 * 2 + 22 * 20

22 x 22 = 22 x (2 + 1 + 19) = 22 x 2 + 22 + 22 x 19

                                  Vậy  số cần tìm là 19.

.....=19 nha bn

1.

22 x 22 = 22 x 2 + 22 + 22 x 19

2.

2700  m = 2,7 km

4,5 km/h = 4500 m/h

~ Thiên Mã ~

lồn to vú sệ

thằng, con nào đọc đc chữ này lồn to

3/22 x 3/11 x 22=

c1:\(\frac{3\times3\times22}{22\times11}=\frac{9}{11}\)                              c2:\(\frac{9}{242}\times22=\frac{9}{11}\)

( 1/2 + 1/3 ) x 2/5=

c1:\(\frac{5}{6}\times\frac{2}{5}=\frac{1}{3}\)                                    c2:\(\frac{1}{2}\times\frac{2}{5}+\frac{1}{3}\times\frac{2}{5}=\frac{1}{5}+\frac{2}{15}=\frac{1}{3}\)

3\22*3\11*22

=9\22*11

=9\22

11\22

=9\11

9/11 ca hai cach

=9/11

\(\frac{3}{22}\times\frac{3}{11}\times22\)

1.\(=\frac{3\times3\times22}{22\times11\times1}\)

\(=\frac{3\times3}{11\times1}\)

\(=\frac{9}{11}\)

2.  \(=\frac{9}{242}\times22\)

\(=\frac{198}{242}\)

\(=\frac{9\times2\times11}{2\times11\times11}\)

\(=\frac{9}{11}\)

\(\left(\frac{1}{2}+\frac{1}{3}\right)\times\frac{2}{5}\)

1.\(=\frac{5}{6}\times\frac{2}{5}\)

\(=\frac{5\times2}{3\times2\times5}\)

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

2.\(\)\(=\frac{1}{2}\times\frac{2}{5}+\frac{1}{3}\times\frac{2}{5}\)

\(=\frac{1}{5}+\frac{2}{15}\)

\(=\frac{3}{15}+\frac{2}{15}\)

\(=\frac{5}{15}=\frac{1}{3}\)

Have a good day

22 x 47 + 2 x 38 x 11 + 15 x 22

= 22 x 47 + 22 x 38 + 15 x 22

= 22 x (47 + 38 + 15 )

= 22 x 100

= 2200

Mk cx hâm mộ conan ng lâ rùi ko đọc, ko bít Ran và Shinichi bây h ra sao nữa

2x47+2x38x11+15x22

=22x47+22x38+22x15

=22x(47+38+15)

=22x100

=2200

22 x47 + 2 x 38 x 11 + 15 x 22

= 22 x ( 47 + 15 ) + 2 x 11 x 38 

= 22 x 72 + 22 x 38

= 1584 + 836

= 2420

Đặt \(A=\sqrt[3]{22\sqrt{2}+25}-\sqrt[3]{22\sqrt{2}-25}\)

\(\Rightarrow A^3=50-3\sqrt[3]{\left(22\sqrt{2}+25\right)\left(22\sqrt{2}-25\right)}\left(\sqrt[3]{22\sqrt{2}+25}-\sqrt[3]{22\sqrt{2}-25}\right)\)

\(\Rightarrow A^3=50-3\sqrt[3]{\left(22\sqrt{2}+25\right)\left(22\sqrt{2}-25\right)}\cdot A\)

\(\Rightarrow A^3=50-3A\sqrt[3]{343}=50-21A\)

\(\Rightarrow A^3+21A-50=0\Leftrightarrow A^3-4A+25A-50=0\)

\(\Leftrightarrow\left(A-2\right)\left(A^2+2A+25\right)=0\)

\(\Leftrightarrow A=2\left(A^2+2A+25>0,\forall A\right)\)

\(\Rightarrow\sqrt[3]{22\sqrt{2}+25}-\sqrt[3]{22\sqrt{2}-25}=2\)

Tick nha bạn 😘

(2/3x3/2) x10/21= 1 x10/21 =10/21

22/5x5/22 x12 = 1x12 =12

2/3 x 10/21 x3/2 = 10/21.

22/5 x 12 x 5/22 = 12.