C)2^11.9^3/3^5.16^2
help me,please!=(((
1)tính hợp lí :
a/1/5-(1/2+3/4):5/2
b/1,5.(1/3-2/3)
c/9/10.23/11-1/11.9/10+9/10
a) 1/5 - (1/2 + 3/4 ) : 5/2
= 1/5 - ( 1/4 + 3/4 ) : 5/2
=1/5 - 1 : 5/2
= 1/5 - 1 . 2/5
= 1/5 - 2/5
= -1/5
b) 1,5 . (1/3 - 2/3)
=3/2 . ( -1/3)
=-1/2
c) 9/10 . 23/11 - 1/11 . 9/10 + 9/10
= 9/10 . ( 23/11 - 1/11 ) + 9/10
= 9/10 . 1 + 9/10
= 9/10 + 9/10
= 18/10 = 9/5
a) 180 − (3 2 . 4 2 − 5.16)
b) 20130 − {152 :[175 + (2 3 . 5 2 − 6.25)]}
c) 389 + [154 + (−389) + (−54)]
GIÚP MÌNH NHA
3. (x+2). (x+2) mũ 2 -1 = 5.16
Tính nhanh :
`(27^5.16^3)/(18^5. 8^2)`
\(\frac{2^{11}.9^2}{3^5.16^2}\)
\(\frac{2^{11}\cdot9^2}{3^5\cdot16^2}\)
\(=\frac{2^{11}\cdot3^4}{3^5\cdot2^8}\)
\(=\frac{2^3}{3}\)
\(=\frac{8}{3}\)
\(\frac{2^{11}\cdot9^2}{3^5\cdot16^2}=\frac{2^{11}\cdot\left(3^2\right)^2}{3^5\cdot\left(2^4\right)^2}=\frac{2^{11}\cdot3^4}{3^5\cdot2^8}=\frac{2^3}{3}=\frac{8}{3}\)
\(\dfrac{2^{11}.9^2}{3^5.16^2}\)
\(\dfrac{2^{11}.9^2}{3^5.16^2}\)
= \(\dfrac{2^{11}.3^4}{3^5.2^8}\)
= \(\dfrac{2^3}{3}\)= \(\dfrac{8}{3}\)= 2, (6)
x + 37,5 + x * 2 = 11.9
1/3 + x/3 * 1/6 = 7/18
4/7 : x * 3/2 + 1/7 = 13/7
x + 37,5 + x * 2 = 11.9
1/3 + x/3 * 1/6 = 7/18
4/7 : x * 3/2 + 1/7 = 13/7
Câu hỏi tương tự Đọc thêmToán lớp 5a)64.25+35.25=25
b)58.42+32.8+5.16
c)42.43+43+57.43
d)456:2 nhân 18+456:3-102
a/ 15^3-3.15^2-3^3 phần 11.34
b/ 8^5.16^3 phần 4^13 - 3^33.4^15 phần 6^32