Rút gọn phân số:
\(\frac{2^3.3^3.5^3.7.8}{3.2^4.5^3.14}\)
Rút gọn phân số sau :
\(\frac{2^3.3^3.5^3.7.8}{3.2^4.5^3.14}\)
\(\frac{2^3.3^3.5^3.7.8}{3.2^4.5^3.14}\)mk viết như vầy bn cố gắng hiểu nhé:.
23.33.53.7.8/ 3.24.53.14
= 23.33.53.7.8/3.24.53.7.2
=23.33.53.8/3.24.53.2
=23.33.53.23/24.2.53
= 23.23.33.53/ 24.2.53
= 26. 33.53/ 25. 53
= 25.2.33.53/25.53
= 2.33/1
= 2. 27/1
= 54/1 = 54
Thế nha bn, chúc bn học tốt!
\(\frac{\left(-2\right)^3.3^3.5^3.7.8}{3.2^4.5^3.14}\)
\(\dfrac{2^4.5^2.7}{2^3.5.7^2.11}\);\(\dfrac{2^3.3^3.5^3.7.8}{3.2^4.5^3.14}\)
\(\dfrac{4^2.5.11}{44.20}\);\(\dfrac{13.15.16}{18.65.7};\dfrac{7.2.8.5^2}{14.2.5}\)
\(\dfrac{2^3.3^3.5}{3.2^3.5^3}\)
a) \(\dfrac{2^4\cdot5^2\cdot7}{2^3\cdot5\cdot7^2\cdot11}=\dfrac{2^3\cdot5\cdot10\cdot7}{2^3\cdot5\cdot7\cdot77}=\dfrac{10}{77}\)
\(\dfrac{2^3\cdot3^3\cdot5^3\cdot7\cdot8}{3\cdot2^4\cdot5^3\cdot14}=\dfrac{2^3\cdot3\cdot5^3\cdot7\cdot3^2\cdot8}{3\cdot2^3\cdot2\cdot5^3\cdot14}=\dfrac{7\cdot3^2\cdot8}{2\cdot14}=\dfrac{63\cdot8}{2\cdot14}=18=\dfrac{1386}{77}\)
-15.8+10.7/5.6+20.3
b, (-2)^3.3^3.5^3.7.8/3.2^4.5^3.14
c, 4.5+4.11/8.7+4.3
Rút gọn phân số :\(\frac{\left(-2\right)^3.3^3.5^3.7.8}{3.5^3.2^4.42}\)
Ta có:
\(\frac{\left(-2\right)^3.3^3.5^3.7.8}{3.5^3.2^4.42}=\frac{\left(-2\right).\left(-2\right).\left(-2\right).3.3.3.5.5.5.7.2.2.2}{3.5.5.5.2.2.2.2.2.3.7}\)
\(=\frac{\left(-2\right)}{1}=-2\)
(-2)^3.3^3.5^3.7.8/3.5^3.2^4.42. rút gọn phân số
RÚT GỌN PHÂN SỐ:\(\frac{\left(-2\right)^3.3^3.5^3.7.8}{3.5^3.2^4.42}\)
Rút gọn biểu thức:
A)(x+1)+(x+2)+(x+3)+...+(x+2010)
B)\(\frac{2^3.3^3.5^3.7.8}{3.^{ }2^4.5^3.14}\)
16 tháng 2 2015 lúc 18:51
RÚT GỌN PHÂN SỐ:(−2)^3.3^3.5^3.7.8/3.5^3.2^4.42
rút gọn được 5^3 và 7.8=42
còn (-2)^3.3^2/2^4=-3^2/2
\(\frac{\left(-2\right)^3.3^3.5^3.7.8}{3.5^3.2^4.42}=\)
\(-\frac{2^3.3^3.5^3.7.2^3}{3.5^3.2^4.2.3.7}=\)
\(-\frac{2^6.3^3.5^3.7}{2^5.3^2.5^3.7}=\)
\(-\left(2.3\right)=-6\)
\(\frac{\left(-2\right)^3.3^3.5^3.7.8}{3.5^3.2^4.42}\)
\(=\frac{\left(-2.3.5\right)^3.7.2^3}{3.5^3.2^4.6.7}\)
\(=\frac{\left(-30\right)^3.2^3}{3.5^3.2^4.6}\)
\(=\frac{\left(-60\right)^3}{3.125.16.6}\)
Làm nốt nhé