75 + 25 + 100 = ?
~ai nhanh. mk k~
100+25+75+100
ai k mk mk k lại
ai k mk thì nói mk nhé
thanks
300 chuc ban gap nhieu may man
nho tk cho minh nha
100+25+75+25+75
k mk mk 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
100+100+100
ai nhanh mk k
ai k mk mk k lại
mk dùng ních phụ nữa
50+50-100+50+25-25=?
ai k mk mk k lại
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
tính nhanh : 10 x 20 -100 x 75 + 10 x 80 - 100 x 25
kban vs 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
tính tổng :
S= 2^3 + 2^5 + 2^7 +.....+ 2^25
S= 3 + 3^2 + 3^3 + ..... + 3^100
GIÚP MK NHA AI NHANH MK K CHO !!!!!!!!!!!!
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) \(S=3+3^2+3^3+...+3^{100}\)
\(\Rightarrow3\cdot S=3\cdot\left(3+3^2+3^3+...+3^{100}\right)\)
\(\Rightarrow3\cdot S=3^2+3^3+3^4+...+3^{101}\)
\(\Rightarrow3\cdot S-S=\left(3^2+3^3+3^4+...+3^{101}\right)-\left(3+3^2+3^3+...+3^{100}\right)\)
\(\Rightarrow2\cdot S=3^{101}-3\)
\(\Rightarrow S=\frac{3^{101}-3}{2}\)
100+100+100+400+300
ai nhanh mk k k cả mk
mk dùng ních phụ k
100+25+20+55
=
ai k mk mk k lại
2000×100=?
Ai nhanh mk k kb nữa k mk mk k lại