\(\left(800+53\right).53+\left(900-47\right).47\)
\(=853.53+853.47\)
\(=853.\left(53+47\right)\)
\(=853.100\)
\(=85300\)
(800+53).53+(900-47).47=853.53+853.47=853.(53+47)=853.100=85300
(-53) . 49 + ( - 49 ) . 47
help mee
thuc hien phep tinh
a)-/12-14/-/98-15+2/-14
b)(-24) -(12-19)-/15-12-7/
2) tinh hop li
a)5-(1997-2005)+1997
b)1579-(53+1679)-(-53)
c)-48725-(357-48725)+300
d)4567+(1234-4567)-4
tinh nhanh :(235-47)+(175-53)
47/53. ( 17/3 - 53/47) + 17/3 .( 6/17 - 47/53)
5/7 . ( 1/2 -1/3 +4/7 ) + ( 1/3 - 1/2 -4/7 ) :7/5
tim x
3 (x-1/2 ) - 5 ( x- 2/3) = 3/2x
help me mik dang can gap . cam on
47/53. ( 17/3 - 53/47) + 17/3 .( 6/17 - 47/53)
SO SÁNH CÁC PHÂN SỐ SAU MỘT CÁCH HỢP LÝ :
13/19 và 47/53 31/40 và 186/241 33/131 và 53/217 41/91 và 411/911
Tinh bang cach hop li
a) \(\left(\frac{1}{4}+\frac{-5}{13}\right)\)+ \(\left(\frac{2}{11}+\frac{-8}{13}+\frac{3}{4}\right)\)
b)\(\left(\frac{21}{31}+\frac{-16}{7}\right)\)+\(\left(\frac{44}{53}+\frac{10}{31}\right)+\frac{9}{53}\)
CÁC BẠN ƯI, GIÚP MIK MẤY BÀI NÀY NHA
\(\frac{\frac{3}{41}-\frac{12}{47}+\frac{27}{53}}{\frac{4}{41}-\frac{16}{47}+\frac{36}{53}}=?\)\(4+2^2+2^4+...+2^{20}\)\(\frac{5^2}{1.6}+\frac{5^2}{6.11}+\frac{^{5^2}}{11.16}+\frac{5^2}{16.21}+\frac{5^2}{21.26}+\frac{5^2}{26.31}\)42. 53 + 47. 156 - 47. 114
53. ( 51 + 4 ) + 53. ( 49 + 96 ) + 53
42. ( 15 + 96 ) + 6. ( 25 +4 ). 7
