300 chuc ban gap nhieu may man

nho tk cho minh nha

100+25+75+100

=125+74+100

=200+100

=300

100+25+75+100=300

=100+100+100

=300

ai k tui tui k lại 

100+25+75+25+75

=125+75+25+75

=200+25+75

=225+75

=300

100 + 25 + 75 + 25 + 75

= 125 + 75 + 25 + 75

= 200 + 25 + 75

= 225 + 75

= 300

100 + 25 + 75 + 25 + 75

= 100 + (25 + 75) + (25 + 75)

= 100 + 100 + 100

= 100 x 3

= 300

300 nhé anh 

=300 nhé

100+100+100=100.3=300 nhé anh 

50+50-100+50+25-25= 50 

 k mk nha bn rùi mk k lại 

50 + 50 - 100 + 50 + 25 - 25 = 50

Đúng nhaLưu Gia Huy

50+50-100+50+25-25=100-100+50+25-25

                                =0+50+25-25

                                =50+25-25

                                =75-25

                                50

ủng họ mk nha

10 . 20 - 100 . 75 + 10 . 80 + 100 . 25

= 10 . ( 20 + 80 ) - 100 . ( 75 + 25 )

= 10 . 100 - 100 . 100 

= 1000 - 10000

= - 9000

10 x 20 -100 x 75 + 10 x 80 - 100 x  25 

10. 10. 2 - 100. 75 + 10. 10. 8 - 100 .25

100.2 -100.75 +100.8 - 100.25

200 - 7500 + 800 - 2500

vô lý

10x20-100x75+10x80-100x25

200-7500+800-2500

-9000

Ta có:
a) \(S=2^3+2^5+2^7+...+2^{25}\)
\(\Rightarrow2^2\cdot S=2^2\cdot\left(2^3+2^5+2^7+...+2^{25}\right)\)
\(\Rightarrow4\cdot S=2^5+2^7+2^9+...+2^{27}\)
\(\Rightarrow4\cdot S-S=\left(2^5+2^7+2^9+...+2^{27}\right)-\left(2^3+2^5+2^7+...+2^{25}\right)\)
\(\Rightarrow3\cdot S=2^{27}-2^3\)
\(\Rightarrow S=\frac{2^{27}-2^3}{3}\)

b) \(S=3+3^2+3^3+...+3^{100}\)
\(\Rightarrow3\cdot S=3\cdot\left(3+3^2+3^3+...+3^{100}\right)\)
\(\Rightarrow3\cdot S=3^2+3^3+3^4+...+3^{101}\)
\(\Rightarrow3\cdot S-S=\left(3^2+3^3+3^4+...+3^{101}\right)-\left(3+3^2+3^3+...+3^{100}\right)\)
\(\Rightarrow2\cdot S=3^{101}-3\)
\(\Rightarrow S=\frac{3^{101}-3}{2}\)

= 1000

tíc nha 

100+100+100+400+300=1000

tk nhé

= 1000

tíc nha

ai k mk thì mk k lại k thì đừng hòng 

100+25+20+55

=125+20+55

=145+55

=200

200000

2000 x 100 = 200000

mik nha

= 200000 nha bạn !

Chúc bạn hok tốt !