15/100 doi ra so thap phan
doi thap phan , hon so ra so thap phan
98va2 phan1000
3va7phan 100
28 phan10
\(98\frac{2}{100}=98,02\)
\(3\frac{7}{100}=3,07\)
\(\frac{28}{10}=2,8\)
\(98\frac{2}{1000}=98,002\)
\(3\frac{7}{100}=3,07\)
\(\frac{28}{10}=2,8\)
kb vs mk nha
30 / 100 doi ra so thap phan bang bao nhieu ?
kb voi mk nhe !
\(\frac{30}{100}=\frac{3}{10}=0,3\)
Đ/s: ...
180 nhe bạn k mình nhe chúc bạn học tốt
Doi ra met(viet ket qua duoi dang phan so thap phan roi duoi dang so thap phan)
3dm,85cm,52mm
3/10 và 0,3
85/100,0,85
54/1000,0,054
Ai đó tk mk nha,mk đang âm điểm,mk hứa sẽ tk lại
3 dm = 0.3 m
85 cm = 0.85 m
52 mm = 0.052 m
\(\frac{3}{10}\)và \(0,3\)
\(\frac{85}{100}\)và \(0,85\)
\(\frac{54}{1000}\)và \(0,054\)
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 : \(M< \frac{1}{3}\)
doi tu 2 phan 5 ra so thap phan
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
8,35 doi ra phan so thap phan la bao nhieu
8,35 = \(\frac{835}{100}\) (= \(\frac{167}{20}\))
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 !!!
Doi 1/7 ra so thap phan(trinh bay cach lam)