doi 0,3(18) ra phan so
viet so 0,3(18) ra phan so?
doi ra ti so phan tram
0,3 0,234 1,25
0,3=30%
0,234=23,4%
1,25=125%
k cho mk nha bn mk trả lời đầu tiên nha k cho mk nha !!!!!!!!!!!!!!!!!
k cho mk nha Lengoclinh nha k cho mk nha bn !!
0,3=30 %
0,234=23,4 %
1,25=125 5
Ai kick k mk mk kick lại cho!!!! lengoclinh kết bạn nha!!!!!
M=15/15×16+15/16×17+15/17×18+15/18×19+15/19×20
Ko doi ra so thap phan chung to M<1/3
M = \(15.\left(\frac{1}{15.16}+\frac{1}{16.17}+...+\frac{1}{19.20}\right)\)
= \(15.\left(\frac{1}{15}-\frac{1}{16}+\frac{1}{16}-\frac{1}{17}+...+\frac{1}{19}-\frac{1}{20}\right)\)
= \(15.\left(\frac{1}{15}-\frac{1}{20}\right)\)
= \(15.\frac{1}{60}\)= \(\frac{1}{4}\)\(< \frac{1}{3}\)
(=) \(M< \frac{1}{3}\)\(\left(đpcm\right)\)
Ta có: \(M=\frac{15}{15.16}+\frac{15}{16.17}+\frac{15}{17.18}+\frac{15}{18.19}+\frac{15}{19.20}\)
\(\Rightarrow M=15.\left(\frac{1}{15.16}+\frac{1}{16.17}+\frac{1}{17.18}+\frac{1}{18.19}+\frac{1}{19.20}\right)\)
\(\Rightarrow M=15.\left(\frac{1}{15}-\frac{1}{16}+\frac{1}{16}-\frac{1}{17}+\frac{1}{17}-\frac{1}{18}+\frac{1}{18}-\frac{1}{19}+\frac{1}{19}-\frac{1}{20}\right)\)
\(\Rightarrow M=15.\left(\frac{1}{15}-\frac{1}{20}\right)\)
\(\Rightarrow M=15.\frac{1}{60}=\frac{1}{4}\)
Ta thấy: \(\frac{1}{4}< \frac{1}{3}\Rightarrow M< \frac{1}{3}\)
Vậy \(M< \frac{1}{3}\)
Chúc bạn học tốt!
\(\Rightarrow M=15.\left(\frac{1}{15.16}+\frac{1}{16.17}+...+\frac{1}{19.20}\right)\)
\(M=15.\left(\frac{1}{15}-\frac{1}{16}+\frac{1}{16}-\frac{1}{17}+...+\frac{1}{19}-\frac{1}{20}\right)\)
\(M=15.\left(\frac{1}{15}+\left(-\frac{1}{16}+\frac{1}{16}\right)+\left(-\frac{1}{17}+\frac{1}{17}\right)+...+\left(\frac{-1}{19}+\frac{1}{19}\right)-\frac{1}{20}\right)\)
\(M=15.\left(\frac{1}{15}+0+0+0+...+0-\frac{1}{20}\right)\)
\(M=15.\left(\frac{1}{15}-\frac{1}{20}\right)=\frac{15}{60}\)
Mà \(\frac{1}{3}=\frac{20}{60}\)
\(\Rightarrow M< \frac{1}{3}\)
Vậy : \(M< \frac{1}{3}\)
mot bien doi co 180 doi vien, chia thanh cac phan doi co 8 hoac 9 doi vien. Biet rang so doi vien trong cac phan doi co 8 ban nhieu hon so doi vien trong cac phan doi co chin ban . Hoi co bao nhieu phan doi moi loai.
nho viet cach iai ra nhe
cam on
minh biet cach giai chu khong biet tra loi
ds:18 phan doi co 8 ban
4 phan doi co 9 ban
doi cac so thap phan 0,9; 0,123;0,03;0,77;0,021 ra phan so
0,9 = 9/10
0,123 = 123/1000
0,03 = 3/100
0,77 = 77/100
0,021 = 21/1000
0,9=\(\frac{9}{10}\)
0,123=\(\frac{123}{1000}\)
0,03=\(\frac{3}{100}\)
0,77=\(\frac{77}{100}\)
0,021=\(\frac{21}{1000}\)
k mk nha
0,9 = \(\frac{9}{10}\)
0,123 = \(\frac{123}{1000}\)
0,03 = \(\frac{3}{100}\)
0,77 = \(\frac{77}{100}\)
0,021 = \(\frac{21}{1000}\)
ủng hộ nha, thanks
doi tu 2 phan 5 ra so thap phan
đổi ra số thập phân, 1mvuong;18mvuong;300mvuong doi ra hec ta va doi 1530 dm khoi ra met khoi doi ra so thap phan
\(1m^2\)= 0,0001 ha
\(18m^2\)=0,0018 ha
\(300m^2\)=0,03 ha
\(1530dm^3\)=\(1,53m^3\)
k nha !!!
tim phan so co mau = 13 , biet rang neu cong tu voi 18 va nhan mau voi 3 thi phan so ko doi
8,35 doi ra phan so thap phan la bao nhieu
8,35 = \(\frac{835}{100}\) (= \(\frac{167}{20}\))