BT1: Thuc hien phep tinh\(\left(-1,25\right).14,7.\left(-8\right)\)\(\frac{3}{4}-1\frac{1}{6}\)\(\frac{-3}{5}.51\frac{11}{13}+\frac{3}{5}.21\frac{11}{13}\)\(\left[\frac{-3}{4}\right].\left[-\frac{2}{3}\right]\)\(\frac{-3}{5}+5\frac{1}{13}-\frac{2}{3}+1\frac{3}{5}-\frac{11}{13}\)\(\frac{3}{4}.\sqrt{16-10}.\sqrt{0,81}\)\(\left(\frac{3}{4}\right)^3:\left(-\frac{3}{8}\right)^3\)\(\frac{6^4.15^3}{8.9^3.10^3}\)BT2: Tim x,y...
Đọc tiếp
BT1: Thuc hien phep tinh
\(\left(-1,25\right).14,7.\left(-8\right)\)
\(\frac{3}{4}-1\frac{1}{6}\)
\(\frac{-3}{5}.51\frac{11}{13}+\frac{3}{5}.21\frac{11}{13}\)
\(\left[\frac{-3}{4}\right].\left[-\frac{2}{3}\right]\)
\(\frac{-3}{5}+5\frac{1}{13}-\frac{2}{3}+1\frac{3}{5}-\frac{11}{13}\)
\(\frac{3}{4}.\sqrt{16-10}.\sqrt{0,81}\)
\(\left(\frac{3}{4}\right)^3:\left(-\frac{3}{8}\right)^3\)
\(\frac{6^4.15^3}{8.9^3.10^3}\)
BT2: Tim x,y biet:
\(x-\frac{3}{5}=\frac{3}{5}\)
\(\left[x\right]-\frac{4}{5}=\frac{2}{5}\)
\(\frac{x}{-5}=\frac{24}{15}\)
\(\frac{x}{4}=\frac{y}{5}vax-y=21\)
