\(x:\frac{1}{4}=8\)
\(x=8.\frac{1}{4}\)
\(x=2\)
x : 1/4 = 8
x = 8 x 1/4
x = 2
k cho mik đi
Đúng ghi Đ, sai ghi S vào chỗ chấm:
a) \(\frac{3}{7}+\frac{1}{3}x\frac{3}{7}=\frac{16}{21}x\frac{3}{7}=\frac{16}{49}\) ......
b)\(\frac{5}{9}+\frac{1}{5}x\frac{5}{6}=\frac{5}{9}x\frac{1}{6}=\frac{13}{18}\) ......
c)\(\frac{13}{9}-\frac{7}{9}:\frac{2}{3}=\frac{6}{9}:\frac{3}{2}=1\) ......
d)\(\frac{11}{8}-\frac{5}{8}:\frac{3}{4}=\frac{11}{8}-\frac{5}{8}x\frac{4}{3}=\frac{11}{8}-\frac{10}{24}=\frac{23}{24}\) ......
Tìm x
X+\(\frac{3}{8}\)=\(\frac{4}{3}\)
X x\(\frac{1}{9}\)=\(\frac{21}{8}\)
X-\(\frac{5}{4}=\frac{7}{6}\)
X :\(\frac{8}{3}=5\)
tìm x biết:
\(\left(x+\frac{1}{2}\right)+\left(x+\frac{1}{4}\right)+\left(x+\frac{1}{8}\right)+\left(x+\frac{1}{16}\right)=\frac{23}{16}\)
Tìm x:\(\left(x+\frac{1}{2}\right)+\left(x+\frac{1}{4}\right)+\left(x+\frac{1}{8}\right)+\left(x+\frac{1}{16}\right)=\frac{23}{16}\)
Trả lời:x là......
1. Tính nhanh
\(\frac{1}{2}\)x \(\frac{2}{3}\)x \(\frac{3}{4}\)x\(\frac{4}{5}\)x \(\frac{5}{6}\)x\(\frac{6}{7}\)x \(\frac{6}{7}\)x \(\frac{7}{8}\)x\(\frac{8}{9}\text{ }\)x \(\frac{9}{10}\)
\(\frac{1}{2}\): \(\frac{3}{2}\): \(\frac{5}{4}\)\(\frac{6}{5}\):\(\frac{7}{6}\):\(\frac{8}{7}\)
(\(1-\frac{1}{3}\)) x (\(1-\frac{1}{4}\)) x (\(1-\frac{1}{5}\)) x (\(1-\frac{1}{6}\)) x (\(1-\frac{1}{7}\)) x (\(1-\frac{1}{8}\)) \(-\frac{1}{4}\)\(x\frac{1}{2}\)
\(x\)là nhân nhé
lm hộ pls
1) Tính A biết rằng :
A = \(\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}+......+\frac{1}{64}\)
2) So sánh 2 phép tính sau:
\(\frac{1+2+3+4+5+6+7}{2+3+4+5+6+7+8}\)và \(\frac{1}{2}+\frac{2}{3}+\frac{3}{4}+\frac{6}{5}+\frac{7}{6}+\frac{8}{7}\)
3) Tìm \(x\)biết:
\(\frac{x\times7}{x}=7\) \(\frac{x}{x\times6}=\frac{1}{6}\)
4) Tìm 1 phân số nếu lấy \(\frac{12}{5}\)trừ đi phân số đó rồi chia cho \(\frac{5}{7}\)thì được \(\frac{12}{5}\).
Bài 1: TÍnh bằng cách thuận tiện
\(\frac{3}{4}x\frac{8}{9}+\frac{3}{4}x\frac{2}{3}\)
\(\frac{7}{8}-\left(\frac{1}{2}\cdot x-\frac{2}{3}\right)=\frac{3}{4}\)
Tìm y là số tự nhiên :
\(\frac{1}{2}x\frac{1}{3}< y< \frac{1}{4}:\frac{1}{8}\)
