Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
`23/34 xx 17/15 xx5/46`
`= 23/30 xx 5/46`
`= 1/12`
\(\dfrac{23}{34}x\dfrac{17}{15}x\dfrac{5}{46}=\dfrac{23x17x5}{34x15x46}=\dfrac{1}{12}\)
a. … = 76 266 – 34 578 = 41 688
… = 126 x 37 = 4662
b. ... = 46 857 + 123 = 46 980
…= 601 759 – 142 = 601 617
a. \(\dfrac{10}{21}>1\)
\(\dfrac{9}{23}< 1\)
\(\Rightarrow\dfrac{10}{21}>\dfrac{9}{23}\)
b. \(\dfrac{32}{33}>\dfrac{31}{33}>\dfrac{31}{34}\Rightarrow\dfrac{32}{33}>\dfrac{31}{34}\)
c. \(\dfrac{44}{47}< \dfrac{45}{47}< \dfrac{45}{46}\Rightarrow\dfrac{44}{47}< \dfrac{45}{46}\)
\(d.\dfrac{70}{117}< \dfrac{70}{115}=\dfrac{14}{23}\Rightarrow\dfrac{70}{117}< \dfrac{14}{23}< \dfrac{15}{23}\)
\(\Rightarrow\dfrac{70}{117}< \dfrac{15}{23}\)
\(\dfrac{3}{46}+\dfrac{4}{23}-\dfrac{1}{115}=\dfrac{15}{230}+\dfrac{40}{230}-\dfrac{2}{230}=\dfrac{53}{230}\)
\(\dfrac{3}{46}+\dfrac{4}{23}-\dfrac{1}{115}\\ \\ =\dfrac{3}{46}+\dfrac{8}{46}-\dfrac{1}{115}\\ \\ =\dfrac{11}{46}-\dfrac{1}{115}\\ \\ =\dfrac{53}{230}\)
=(12+88) +(34+46)*2+(55+65)=100+2*80+120=100+160+120=380
64 x 34 + 23 - 46 : 4
= 2176 + 23 - 11,5
= 2187,5
nhé!
2187.5