Chương III : Phân số
Các câu hỏi tương tự
Bài1 :Tìm x:
( 6 : 3/5 - 17/16 . 6/7 / 21/5 . 10/11 + 57/11 - (3/20 + 1/2 - 1/15) . 12/49 / 10/3 + 2/9 ) . x = 215/96
Ai nhanh mk K ạ.
Thực hiện phép tính :
a, 2/3 - 5/7 . 14/25
b, 3/4 + -5/6 - 11/-12
c, (1/2)^2 - 1và1/2 + 0,5 . 12/5 + 5%
d, 1,25 : 15/20 + ( 25% - 5/6 ) : 4và2/3
e, -5/9 + 5/9 : ( 3và1/3 - 1 và2/3 )
Help meeeee! Cíu mình vớiiiiiii 
Cho mình hỏi:. Tính hợp lý :. a. -1/20 + -1/30 + -1/42 + -1/56 + -1/72 + -1/90. b. 5/1×2 + 4/1×11 + 3/11×2 + 1/15×1 + 13/15×4
Cảm ơn
1. Tính :
a. 3/5- -7/10-13/20
b. 3/4+ -1/3-5/18
c. 3/14-5/-8+ -1/2
d. 1/2+ 1/-3+1/4- -1/6
đ. 19/24-1/2-1/3- 7/24
g. -1/3+1/2-5/6
e. 4/-9+8/5+ -5/9-2/11+7/15
ê. 7/11-(3/5+7/11)
Nhờ các bạn giúp mình vs cảm ơn các bạn nhiều. Mình tick cho.
1) dfrac{5}{13} +dfrac{-5}{17} + dfrac{-20}{41} + dfrac{8}{13} +dfrac{-21}{41}2) dfrac{1}{5} + dfrac{-2}{9} + dfrac{-7}{9} + dfrac{4}{5} +dfrac{16}{17}3) dfrac{2}{3.5} + dfrac{2}{5.7} +dfrac{2}{7.9} +....................+ dfrac{2}{99.101}
Đọc tiếp
1) \(\dfrac{5}{13}\) +\(\dfrac{-5}{17}\) + \(\dfrac{-20}{41}\) + \(\dfrac{8}{13}\) +\(\dfrac{-21}{41}\)
2) \(\dfrac{1}{5}\) + \(\dfrac{-2}{9}\) + \(\dfrac{-7}{9}\) + \(\dfrac{4}{5}\) +\(\dfrac{16}{17}\)
3) \(\dfrac{2}{3.5}\) + \(\dfrac{2}{5.7}\) +\(\dfrac{2}{7.9}\) +....................+ \(\dfrac{2}{99.101}\)
1:Tính
a) left(dfrac{1}{7}.x-dfrac{2}{7}right).left(dfrac{-1}{5}.x-dfrac{2}{5}right)0
b) dfrac{1}{6}.x+dfrac{1}{10}.x-dfrac{4}{5}.x+10
2:So sánh:
a) Aleft(dfrac{-46}{51}.0,32.dfrac{17}{20}right):dfrac{64}{75}
Bdfrac{-10}{11}.dfrac{8}{9}+dfrac{7}{8}.dfrac{10}{11}
b) Adfrac{-1}{3}+dfrac{0,2-0,375+dfrac{5}{11}}{-0,3+dfrac{9}{16}-dfrac{15}{22}}
Bdfrac{-43}{51}.dfrac{19}{80}
Đọc tiếp
1:Tính
a) \(\left(\dfrac{1}{7}.x-\dfrac{2}{7}\right).\left(\dfrac{-1}{5}.x-\dfrac{2}{5}\right)=0\)
b) \(\dfrac{1}{6}.x+\dfrac{1}{10}.x-\dfrac{4}{5}.x+1=0\)
2:So sánh:
a) A=\(\left(\dfrac{-46}{51}.0,32.\dfrac{17}{20}\right):\dfrac{64}{75}\)
B=\(\dfrac{-10}{11}.\dfrac{8}{9}+\dfrac{7}{8}.\dfrac{10}{11}\)
b) A=\(\dfrac{-1}{3}+\dfrac{0,2-0,375+\dfrac{5}{11}}{-0,3+\dfrac{9}{16}-\dfrac{15}{22}}\)
B=\(\dfrac{-43}{51}.\dfrac{19}{80}\)
a. 19+(29-9*37)-(63*9-29*99)
b.1/2+1/4+1/8+1/16+1/32+1/64+1/128
c. 5*4^15*9^9-4*3^20*8^9
____________________________
5*2^9*6^19-7*2^29*27^6
ý c la phan số nhé
Bài 1: Thực hiện phép tính một cách hợp lí:
f) \(\dfrac{-5}{9}\) + \(\dfrac{8}{15}\) + \(\dfrac{-2}{11}\) + \(\dfrac{4}{-9}\) +\(\dfrac{7}{15}\)
Tính tổng sau: a) 1/2+1/6+1/12+1/20+1/30 b) 1/15+1/35+1/63+1/99+1/143 c) 1/6+1/12+1/20+1/30+1/42+1/56 d) 1/2+1/2^2+1/2^3+1/2^4+1/2^5 e) 1/7+1/7^2+1/7^3+...+1/7^100 f) 1+1/2*(1+2)+1/3*(1+2+3)+1/4*(1+2+3+4)+...+1/200*(1+2+3+..+200) g) (1/2+1)*(1/3+1)*(1/4+1)*..*(1/100+1) h) (1-1/2)*(1-1/3)*(1-1/4)*...*(1-1/2022) Giúp mk vs ạkkk