\(\frac{31995-81}{42660-108}=????\)
Giúp mk voi mk t cho
a) 31995-81/42660-108 b)3.5.7.11.37-10101/1212120+40404 Ai làm nhanh mk tick cho nha
Câu a) \(\dfrac{31995-81}{42660-108}=\dfrac{31914}{42552}=\dfrac{31914:10638}{42552:10638}\)
=\(\dfrac{3}{4}\)
Câu b) \(\dfrac{\left(3.5.7.11.13.15.37-10101\right)}{121212+40404}\)
=\(\dfrac{\left(3.5.7.11.13.15.37-3.7.13.37\right)}{3.7.13.37.12+3.7.13.37.4}\)
=\(\dfrac{3.7.13.37\left(5.11.15-1\right)}{3.7.13.37\left(12+4\right)}\)
= \(\dfrac{824}{16}\)=\(\dfrac{103}{2}\)
a) \(\dfrac{31995-81}{42660-108}=\dfrac{31914}{42552}=\dfrac{3}{4}\)
b: \(\dfrac{3\cdot5\cdot7\cdot11\cdot37-10101}{1212120+40404}=\dfrac{32634}{1252524}=\dfrac{21}{806}\)
Rút gọn phân số:
\(a,\dfrac{31995-81}{42660-108}\)
\(b,\dfrac{3.5.7.11.13.37-10101}{1212120+40404}\)
\(\)
a: \(\dfrac{31995-81}{42660-108}=\dfrac{31914}{42552}=\dfrac{3}{4}\)
b: \(\dfrac{3\cdot5\cdot7\cdot11\cdot13\cdot37-10101}{1212120+40404}=\dfrac{545454}{1252524}=\dfrac{27}{62}\)
cách rút gọn phân số sau:
31995-81
42660-108
Rút gọn:
A = \(\frac{31995-81}{42660-108}\)
B = \(\frac{3.5.7.11.13.37-10101}{1212120+40404}\)
Giúp nha !
A = \(\frac{3^4\left(5.79-1\right)}{2^2.3^2\left(5.79-1\right)}=\frac{9}{4}\); B = \(\frac{3.7.13.37\left(5.11-1\right)}{4.3.7.13.37\left(3.5-1\right)}=\frac{54}{4.14}=\frac{2.9}{4.2.7}=\frac{9}{28}\)
Rút gọn phân số :
A = 31995 - 81 / 42660 - 108
Mongg các bạn giải hộ mình
31995 - 81 / 42660 - 108
= 31914 / 42552
= 3.10638 / 4.10638
= 3/4
31995 - 81 / 42660 - 108
= 31914 / 42552
= 3.10638 / 4.10638
= 3/4
:3
Bài 1: rút gọn các phân số
A) 31995-81/ 42660- 108
B) 7.2.7.5^2/ 14.2.5
C) 2^2 . 3^3 . 5/ 3.2^3.5^3
D) 5^3.90.4^3 / 25^2 . 3^2 . 2^13
E) 18.27+ 18.(-23)/ 34.4-4.52
F) 15^2.16^4-15^3.16^3/ 12^2.20^3-20^2.12^3
G) 2.3+4.6+14.21/3.5+6.10+21.35
A) 31995-81/ 42660- 108
= 31914/42552
= 3/4
B) 7.2.7.52/ 14.2.5
= 14 . 7 . 25 / 140
= 98 . 25/140
= 2450/140
= 35/2
C) 2^2 . 3^3 . 5/ 3.2^3.5^3
= 4 . 27 . 5 / 3 . ( 2 . 5 )3
= 108 . 5 / 3. 103
= 540 / 3000
= 9/50
f)\(\frac{15^2.16^4-15^3.16^3}{12^2.20^3-20^2+12^3}\)=\(\frac{15^2.16^3.\left(16-15\right)}{12^2.20^3.\left(20-12\right)}=\frac{15^2.16^3}{12^2.20^2.8}=\frac{1}{8}\)
Rút gọn :
A = \(\frac{4157-19}{12471-57}\)
B = \(\frac{7}{10^2+8.10^2}\)
C = \(\frac{31995}{42660-108}\)
D = \(\frac{2^{45}.5^3.2^6.3}{8.2^{18}.81.5}\)
Ai làm đầy đủ , chi tiết , tui tk 10 lần .
Nhanh lên nhé ! 1h tui đi học rùi !
\(A=\frac{4157-19}{12471-57}\)\(=\frac{4138}{12414}\)\(=\frac{4138:4138}{12414:4138}\)\(=\frac{1}{3}\)
\(B=\frac{7}{10^2+8.10^2}\)\(=\frac{7}{100+8.100}\)\(=\frac{7}{100+800}\)\(=\frac{7}{900}\)
\(C=\frac{31995}{42660-108}\)\(=\frac{31995}{42552}\)\(=\frac{31995:27}{42552:27}\)\(=\frac{1185}{1576}\)
\(D=\frac{2^{45}.5^3.2^6.3}{8.2^{18}.81.5}=\frac{2^{51}.5^3.3}{2^3.2^{18}.3^4.5}=\frac{2^{51}.5^3.3}{2^{21}.3^4.5}=\frac{2^{30}.5^2}{3^3}\)
k mình nhé.
A=4138/12414=1/3
B=7/900
C=31995/42552=1185/1576
Phần D tui chịu, ahihi
Rút gọn
a/ \(\frac{4157-19}{12471-57}\) b/\(\frac{7}{10^2+6.10^2}\) c/\(\frac{31995-81}{42660-108}\) d/\(\frac{3.5.7.11.13.37-10101}{12.12.102+40404}\)
e/ \(\frac{2^{15}.5^3.2^6.3^4}{8.2^{18}.81.5}\) f/\(\frac{3^9.3^{20}.2^8}{3^{24}.243.2^6}\)
Tính:
\(\left(\frac{3}{4}-81\right)\left(\frac{3^2}{5}-81\right)\left(\frac{3^3}{6}-81\right)...\left(\frac{3^{2000}}{2003}-81\right)\)
Các bạn ơi giúp mk vs,mk đg cần bài này gấp!
các bn giải hộ mk nhé.ai nhanh nhất thì mk tick cho(giải chi tiết)
thanks nhìu!