A)\(-6.(-\frac{2}{3}).0,25\)
B)
\(-\frac{15}{4}.(\frac{-7}{15}).(-2\frac{2}{5})\)
C)
\(\left(-0,4\right)^2-\left(-0,4\right)^3.\left(-3\right)\)
D)
\(\left[\left(-2,7\right)^4\right]^5-\left[\left(-2,7\right)^2\right]^{10}\)
E)
\(\left(8^{14}:4^{12}\right):\left(16^6:8^2\right)\)
giúp mình nhé
mình cám ơn nhiều ❤❤❤
a) \(-6.\left(-\frac{2}{3}\right).0,25\)
\(=-6.\left(-\frac{2}{3}\right).\frac{1}{4}\)
\(=4.\frac{1}{4}\)
\(=1.\)
b) \(-\frac{15}{4}.\left(-\frac{7}{15}\right).\left(-2\frac{2}{5}\right)\)
\(=-\frac{15}{4}.\left(-\frac{7}{15}\right).\left(-\frac{12}{5}\right)\)
\(=\frac{7}{4}.\left(-\frac{12}{5}\right)\)
\(=-\frac{21}{5}.\)
c) \(\left(-0,4\right)^2-\left(-0,4\right)^3.\left(-3\right)\)
\(=0,16-\left(-0,064\right).\left(-3\right)\)
\(=0,16-0,192\)
\(=-0,032.\)
Chúc bạn học tốt!
\(D=\left(-0,4\right)^2-\left(-0,4\right)^3.\left(-3\right)\\ D=0,16-0,192=-0,032\\ E=\left(8^{14}:4^{12}\right):\left(16^6:8^2\right)\\ E=262144:262144\\ E=1\)
