->  M = (100 – 1).(100 – 2^2). (100 – 3^2)…(100 – 50^2)

M = (100 – 1).(100 – 2^2). (100 – 3^2)… (100 – 9^2) .(100 – 10^2) .(100 – 11^2) …(100 – 50^2)

M = (100 – 1).(100 – 2^2). (100 – 3^2)… (100 – 9^2). (100 – 100) .(100 – 11^2) …(100 – 50^2)

M = (100 – 1).(100 – 2^2). (100 – 3^2)… (100 – 9^2) .0.(100 – 11^2) …(100 – 50^2)

M = 0

Vậy M = 0.

10+90=100

11+89=100

12+88=100

100+5+78+22+100+78+95+22=500

10+90=100

11+89=100

12+88=100

100+5+78+22+100+78+95+22=500

10 + 90 = 100

11 + 89 = 100

12 + 88 = 100

100 + 5 + 78 + 22 + 100 + 78 + 95 + 22

= 100 + 100 + ( 5 + 95 ) + ( 78 + 22 ) + ( 78 + 22 )

= 100 x 5

= 500

\(A=-5^{22}\left\{-222\left[-122-\left(100-5^{22}\right)+2022\right]\right\}\)

\(A=-5^{22}\left\{-222\left[1900-\left(100-5^{22}\right)\right]\right\}\)

\(A=-5^{22}\left[-222\left(1900-100+5^{22}\right)\right]\)

\(A=-5^{22}\left[-222\left(1800+5^{22}\right)\right]\)

\(A=-5^{22}\left(-399600-222\cdot5^{22}\right)\)

\(A=399600\cdot5^{22}+222\cdot5^{44}\)

               78 * 100 + 100 * 22 

              = ( 78 + 22 ) * 100 

              =  100 *  100

             =  10000

               k nha kb luôn

= 100x(78+22)

=100x100

=10000

78*100+100*22

=(78+22)*100

=100*100

=10000

\(22+78+22+33+44+88+66+100\)

\(=\left(22+78\right)+\left(22+88\right)+\left(44+66\right)+33+100\)

\(=100+110+110+33+100\)

\(=453\)

bằng 453

k giúp mình nhé

453 k mk nha

Bài làm

Ta có: 7m² 22dm²= 722 dm²

\(7\frac{22}{100}=7\frac{11}{50}=\frac{360}{50}=\frac{36}{5}=7,2dm^2\)

Vì 722dm² > 7,2 dm² 

Vậy 7m² 22dm²=\(7\frac{22}{100}\)dm² là sai

Lời giải:

$=5^{22}-22+[122-(100+5^{22})+2022]$

$=5^{22}-22+122-100-5^{22}+2022$

$=(5^{22}-5^{22})+(-22+122-100)+2022$

$=0+0+2022=2022$

           Số số hạng của dãy là:

                  [100-20]:1+1=81

           Tổng của dãy là:

                  [100+20].81:2=4860 

a)=9600

37

166

85

174