Lê Kim Cúc
Giới thiệu về bản thân
\(98+98\cdot100-101\cdot98\)
\(=98\cdot1+98\cdot100-101\cdot98\)
\(=98\cdot1+100\cdot98-101\cdot98\)
\(=98\cdot\left(1+100-101\right)\)
\(=98\cdot0\)
\(=0\)
\(1.\) \(money\)
\(2.\) \(moon\)
\(3.\) \(mother\)
\(4.\) \(monday\)
\(5.\) \(morning\)
\(6.\) \(meet\)
\(7.\) \(meat\)
\(8.\) \(milk\)
\(9.\) \(move\)
\(10.\) \(much\)
\(11.\) \(main\)
\(12.\) \(mood\)
\(13.\) \(mess\)
\(14.\) \(mile\)
\(15.\) \(mate\)
Số vải may quần là \(:\)
\(345\cdot40:100=138\) (m)
Số vải may áo là \(:\)
\(345-138=207\) (m)
Đáp số \(:\) \(207\) (m)
Là am, is, are
\(\dfrac{a}{b}:\dfrac{1}{2}\cdot\dfrac{3}{4}=\dfrac{6}{5}\)
\(\dfrac{a}{b}:\dfrac{1}{2}=\dfrac{6}{5}:\dfrac{3}{4}\)
\(\dfrac{a}{b}:\dfrac{1}{2}=\dfrac{6}{5}\cdot\dfrac{4}{3}\)
\(\dfrac{a}{b}:\dfrac{1}{2}=\dfrac{24}{15}\)
\(\dfrac{a}{b}:\dfrac{1}{2}=\dfrac{8}{5}\)
\(\dfrac{a}{b}=\dfrac{8}{5}\cdot\dfrac{1}{2}\)
\(\dfrac{a}{b}=\dfrac{4}{5}\)
Vậy \(a=4,b=5\)
Số số hạng là :
( \(2005-1\) ) \(:1+1=2005\)
Tổng dãy số :
\(\left[\left(2005+1\right)\cdot2005\right]:2\)
\(=2006\cdot2005:2\)
\(=4022030:2\)
\(=2011015\)
\(a\)) \(x\) x \(\dfrac{4}{5}=\dfrac{3}{4}-\dfrac{2}{5}\)
\(x\) x \(\dfrac{4}{5}=\dfrac{15}{20}-\dfrac{8}{20}\)
\(x\) x \(\dfrac{4}{5}=\dfrac{7}{20}\)
\(x=\dfrac{7}{20}:\dfrac{4}{5}\)
\(x=\dfrac{7}{20}\) x \(\dfrac{5}{4}\)
\(x=\dfrac{35}{80}\)
\(x=\dfrac{7}{16}\)
\(b\)) \(x:\dfrac{3}{5}=\dfrac{5}{7}+1\)
\(x:\dfrac{3}{5}=\dfrac{5}{7}+\dfrac{7}{7}\)
\(x:\dfrac{3}{5}=\dfrac{12}{7}\)
\(x=\dfrac{12}{7}\) x \(\dfrac{3}{5}\)
\(x=\dfrac{36}{35}\)