3,2. 15/64 - ( 4/5+2/5 ) : 3 và 2/3
3,2. 15/64 - ( 4/5+2/5 ) : 3 và 2/3
(-3,2)x -15/64+(0,8-2 và 4/5):3 và 2/3
Giup mình nha,mình cần gấp !!!!!!!!
\(\dfrac{-3}{2}\times\dfrac{-15}{64}+\left(0,8-2\dfrac{4}{5}\right):3\dfrac{2}{3}\\ =\dfrac{45}{128}+\left(-2\right)\times\dfrac{3}{11}\\ =\dfrac{45}{128}-\dfrac{6}{11}\\ =-\dfrac{273}{1408}\)
(-3,2) . -15/64 + ( 0,8 - 2 4/5 ) : 3 2/3
a) 3,2 . -15/64-(4/5+2/3): cho hỗn số ba 2/3
\(=\frac{16}{5}.\frac{-15}{64}-\left(\frac{4}{5}+\frac{2}{3}\right):3\frac{2}{3}=\frac{16}{5}.\frac{-15}{64}+\frac{-22}{15}:\frac{11}{3}=\frac{-3}{4}+\frac{-2}{5}=\frac{-23}{20}\)
(-3,2).-15/64+(0,8-2 4/15): 3 2/3
số 2 4/5, 3 2/3 là hỗn số nhé .
Ai giúp mk bài này .
XIN TRÂN TRỌNG CẢM ƠN Ạ
/ là phân số
/ là phân số
1.=6/7.8/13+6/7.9/13-3/13.6/7=6/7.(8/13+9/13-3/13)=6/7.14/13=12/13
Tính thuận tiện
a) A=(15 - 6 13/18) : 11 1/27 - 2 1/8 : 1 11/40
b) B=(-3,2) . -15/64 + (0,8 - 2 4/15): 3 2/3
c) C= -7/9 . 4/11 + -7/9. 7/11 + 5 7/9
d) D= 50% .1 1/3 . 10 . 7/35 . 0,75
e) E= (2/5)^2 + 5 1/2 (4,5 - 2) + 23/-4
a: \(=\left(15-6-\dfrac{13}{18}\right):\dfrac{298}{27}-\dfrac{17}{8}:\dfrac{51}{40}\)
\(=\dfrac{149}{18}\cdot\dfrac{27}{298}-\dfrac{5}{3}=\dfrac{3}{2}-\dfrac{5}{3}=\dfrac{9-10}{6}=\dfrac{-1}{6}\)
b: \(=\dfrac{-16}{5}\cdot\dfrac{-15}{64}+\dfrac{-22}{15}:\dfrac{11}{2}\)
\(=\dfrac{3}{4}-\dfrac{4}{15}=\dfrac{29}{60}\)
c: \(=\dfrac{-7}{9}\left(\dfrac{4}{11}+\dfrac{7}{11}\right)+5+\dfrac{7}{9}=\dfrac{-7}{9}+\dfrac{7}{9}+5=5\)
d: \(=\dfrac{1}{2}\cdot\dfrac{4}{3}\cdot10\cdot\dfrac{1}{5}\cdot\dfrac{3}{4}=1\)
e: \(=\dfrac{4}{25}+\dfrac{11}{2}\cdot\dfrac{5}{2}+\dfrac{-23}{4}=\dfrac{204}{25}\)
( -3,2). -15/64 + (80% - 2 4/15 ) : 3 2/3
\(\left(-3,2\right).\left(-\dfrac{15}{64}\right)+\left(80\%-2\dfrac{4}{15}\right):3\dfrac{2}{3}=-\dfrac{16}{5}.\left(-\dfrac{15}{64}\right)+\left(\dfrac{4}{5}-\dfrac{34}{15}\right):\dfrac{11}{3}=-\dfrac{16}{5}.\left(-\dfrac{15}{64}\right)+\dfrac{46}{15}:\dfrac{11}{3}=\dfrac{3}{4}+\dfrac{46}{55}=\dfrac{349}{220}\)
(-3,2).-15/64+(0,8-2/4/15):3/2/3