Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(\frac{11}{15}\cdot\frac{6}{7}+\frac{11}{15}\cdot\frac{8}{7}\)
\(=\frac{11}{15}\cdot\left(\frac{6}{7}+\frac{8}{7}\right)\)
\(=\frac{11}{15}\cdot2=\frac{22}{15}\)
Chú ý dấu " \(\cdot\) " là dấu nhân
\(\frac{27}{8}-\frac{7}{3}+\frac{4}{3}-2\)
=\(\frac{27}{8}-\left(\frac{7}{3}-\frac{4}{4}\right)-2\)
=\(\frac{27}{8}-1-2\)
=\(\frac{27}{8}-\frac{8}{8}-\frac{16}{8}\)
=\(\frac{3}{8}\)
a.8/15+7/4+7/15+5/4
=8/15+7/15+7/4+5/4
=15/15+12/4
=1+3=4
b.98,54-(41,82-35,72)
=98,54-6,1
=92,44
Bài 2
a.8/15+7/4+7/15+5/4
=8/15+7/15+7/4+5/4
=15/15+12/4
=1+3
=4
b.98,54-(41,82-35,72)
=98,54-6,1
=92,44
\(5\dfrac{3}{4}:3+2\dfrac{1}{4}\times\dfrac{1}{3}-\dfrac{1}{8}=\left(5\dfrac{3}{4}+2\dfrac{1}{4}\right)\times\dfrac{1}{3}-\dfrac{1}{8}\\ =8\times\dfrac{1}{3}-\dfrac{1}{8}=\dfrac{8}{3}-\dfrac{1}{8}=\dfrac{61}{24}\\ ----\\ \dfrac{3}{5}:\dfrac{5}{6}:\dfrac{6}{7}:\dfrac{7}{8}+\dfrac{2}{5}+\dfrac{23}{35}\\ =\dfrac{3}{5}\times\dfrac{6}{5}\times\dfrac{7}{6}\times\dfrac{8}{7}+\dfrac{2}{5}+\dfrac{23}{35}=\dfrac{18}{25}\times\dfrac{4}{3}+\dfrac{2}{5}+\dfrac{23}{35}=\dfrac{353}{175}\)
15/8-4/7+2-3/7=15/8-(4/7+3/7)+2=15/8+1+2=15/8+3=39/8