mọi người giúp em với, lẹ lẹ và chi tiết nha

Question

Tính :

a) $27^{3}:3^{2}$

b) $\left ( \frac{3}{5} \right )^{15}:\left ( \frac{9}{25} \right )^{5}$

c) $5-\left ( -\frac{5}{11} \right )^{0}+\left ( \frac{1}{3} \right )^{2}:3$

d) $2^{3}+3.\left ( \frac{1}{2} \right )^{0}+\left[ {\left ( -2 \right )^{2}:\frac{1}{2}} \right].8$

score 2 · Answer 1

$2^{3}+3.\left ( \frac{1}{2} \right )^{0}+\left[ {\left ( -2 \right )^{2}:\frac{1}{2}} \right].8=8+3+64=75$ :)

score 2 · Answer 2

$5-\left ( -\frac{5}{11} \right )^{0}+\left ( \frac{1}{3} \right )^{2}:3=5-1+\frac{1}{27}=\frac{109}{27}$ :)

score 3 · Answer 3

$(\frac{3}{5})^{15}:(\frac{9}{25})^5=(\frac{3}{5})^{15}:(\frac{3}{5})^{10}=(\frac{3}{5})^5$ :)

score 3 · Answer 4

a) $27^3=3^9\Rightarrow 27^3:3^2=3^9:3^2=3^7$ :)

còn 2 câu nữa ? – Hàn Thiên Dii 01-08-16 09:50 AM

4 Đáp án