Chương III : Phân số
Các câu hỏi tương tự
8/15-3/10+7/20 3/5-2/3+1/4/5:4/3 7/7/8-5/5/6
x=1/4+2/13
x/3=2/3+-1/7
-8/3+1/3<x<-2/7+-5/7
-5/6 +8/3+29/-6=<x>=-1/2+2+5/2
1/6+2/5
3/5+-7/4
4/13+-12/30
-3/29+16/58
8/40+-36/45
-8/18+15/27
D = (19 5/8:7/12-13 1/4:7/12).4/5
1 . tính bằng cách hợp lí :
a . ( 5/6 + 3/4 - 0,9 ) : ( 5/6 - 3/4 + 0,9 )
b . ( 13 7/12 + 4 3/10 ) - 8 7/12
c . 31 4/17 - 8 5/13 - 11 8/13
Thực hiện phép tính ( tính nhanh nếu có thể ) a, -5/21 + -2/21 + 8/24b, 4/11 . -2/7 + 4/11 . -4/7 + 4/11 . -1/7c, 10dfrac{5}{9} - ( 3dfrac{5}{7} + 4dfrac{5}{9} )d, 1/3 + 1dfrac{3}{4} - ( 1dfrac{3}{4} - 80% )e, 5dfrac{3}{5} + 7dfrac{21}{48} : 10/7 - 5dfrac{21}{48} : 10/7f, -5/7 . 2/11 - 5/11 . 9/7 + 2dfrac{5}{7}g, -3/13 . 6/8 + 7/13 . -3/8 + 1dfrac{3}{8}
Đọc tiếp
Thực hiện phép tính ( tính nhanh nếu có thể )
a, -5/21 + -2/21 + 8/24
b, 4/11 . -2/7 + 4/11 . -4/7 + 4/11 . -1/7
c, \(10\dfrac{5}{9}\) - ( \(3\dfrac{5}{7}\) + \(4\dfrac{5}{9}\) )
d, 1/3 + \(1\dfrac{3}{4}\) - ( \(1\dfrac{3}{4}\) - 80% )
e, \(5\dfrac{3}{5}\) + \(7\dfrac{21}{48}\) : 10/7 - \(5\dfrac{21}{48}\) : 10/7
f, -5/7 . 2/11 - 5/11 . 9/7 + \(2\dfrac{5}{7}\)
g, -3/13 . 6/8 + 7/13 . -3/8 + \(1\dfrac{3}{8}\)
Tìm x
a)3/4 : x - 17/5 = 7/10
b) 2/7 + 5/7x =8/21
c)11/5 - 6/5 : x = 4/7
d) -3/4x + 3/4 =11/12
j) dfrac{-3}{4} + dfrac{2}{7} + dfrac{-1}{4} +dfrac{3}{5} +dfrac{5}{7}k) dfrac{-2}{17}+ dfrac{15}{23} + dfrac{-15}{17} + dfrac{4}{19} +dfrac{8}{23}
Đọc tiếp
j) \(\dfrac{-3}{4}\) + \(\dfrac{2}{7}\) + \(\dfrac{-1}{4}\) +\(\dfrac{3}{5}\) +\(\dfrac{5}{7}\)
k) \(\dfrac{-2}{17}\)+ \(\dfrac{15}{23}\) + \(\dfrac{-15}{17}\) + \(\dfrac{4}{19}\) +\(\dfrac{8}{23}\)
(4 5/58 - 3 1/2 + 8 15/29)-(3 5/58 - 7 14/29)
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)
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