Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(\frac{3}{4}+\frac{5}{8}-\frac{5}{6}\)
\(=\frac{3}{4}\times1+\frac{5}{8}\times1-\frac{5}{6}\times1\)
\(=\frac{3}{4}\times\frac{6}{6}+\frac{5}{8}\times\frac{3}{3}-\frac{5}{6}\times\frac{4}{4}\)
\(=\frac{3\times6}{4\times6}+\frac{5\times3}{8\times3}-\frac{5\times4}{6\times4}\)
\(=\frac{18}{24}+\frac{15}{24}-\frac{20}{24}\)
\(=\frac{18+15-20}{24}\)
\(=\frac{13}{24}\)
Vậy GTBT \(\frac{3}{4}+\frac{5}{8}-\frac{5}{6}\) là \(\frac{13}{24}\)
\(\frac{3}{4}+\frac{5}{8}-\frac{5}{6}\)
\(=\frac{3\times6+5\times3-5\times4}{24}\)
\(=\frac{18+15-20}{24}\)
\(=\frac{33-20}{24}\)
\(=\frac{13}{24}\)
1.
a) 10=\(\dfrac{40}{4}\)
b) 25= \(\dfrac{100}{4}\)
2.
a) 11=\(\dfrac{11}{1}\)
b) 276=\(\dfrac{276}{1}\)
c) 158=\(\dfrac{158}{1}\)
3.
\(\dfrac{1}{1};\dfrac{2}{2};\dfrac{3}{3};\dfrac{4}{4};\dfrac{5}{5}\)
\(\dfrac{3}{5}+\dfrac{5}{8}+\dfrac{7}{5}=\dfrac{21}{8}\)
\(\left(\dfrac{3}{5}+\dfrac{7}{5}\right)+\dfrac{5}{8}\)
\(=2+\dfrac{5}{8}\)
\(=\dfrac{16}{8}+\dfrac{5}{8}\)
\(=\dfrac{21}{8}\)
\(a,5=\dfrac{20}{4};11=\dfrac{44}{4};21=\dfrac{84}{4};200=\dfrac{800}{4};125=\dfrac{500}{4};2000=\dfrac{8000}{4}\\ b,2=\dfrac{108}{54};3=\dfrac{108}{36};108=\dfrac{108}{1};1=\dfrac{108}{108};9=\dfrac{108}{12};4=\dfrac{108}{27};6=\dfrac{108}{18}\)
1/4=25/100 ; 4/25=16/100; 3/5=60/100; 5/8=625/1000
1/4=0,25
4/25=0,16
3/5=0,5/8=0,625