Bài 2: Cộng, trừ số hữu tỉ
Các câu hỏi tương tự
Thực hiện phép tính
a. dfrac{-1}{24}-left{dfrac{1}{4}-left(dfrac{1}{2}-dfrac{7}{8}right)right}
b.left(8dfrac{5}{11}+3dfrac{5}{8}right)-3dfrac{5}{11}
c.dfrac{4}{9}:left(dfrac{-1}{7}right)+6dfrac{5}{9}:left(dfrac{-1}{7}right)
d. left(dfrac{-1}{5}+dfrac{3}{7}right):dfrac{2}{11}+left(dfrac{-4}{5}+dfrac{4}{7}right):dfrac{2}{11}
M.n giúp mk nha
Đọc tiếp
Thực hiện phép tính
a. \(\dfrac{-1}{24}-\left\{\dfrac{1}{4}-\left(\dfrac{1}{2}-\dfrac{7}{8}\right)\right\}\)
b.\(\left(8\dfrac{5}{11}+3\dfrac{5}{8}\right)-3\dfrac{5}{11}\)
c.\(\dfrac{4}{9}:\left(\dfrac{-1}{7}\right)+6\dfrac{5}{9}:\left(\dfrac{-1}{7}\right)\)
d. \(\left(\dfrac{-1}{5}+\dfrac{3}{7}\right):\dfrac{2}{11}+\left(\dfrac{-4}{5}+\dfrac{4}{7}\right):\dfrac{2}{11}\)
M.n giúp mk nha
ai giúp mik quy đồng bài này đi, cảm ơn nha. Chỉ quy đồng thôi nha !
\(\dfrac{1}{5}+\dfrac{1}{2}-\dfrac{1}{3}\)
29 tháng 6 2021 lúc 12:31
e) \(\dfrac{3}{3x}-\dfrac{3}{12}=\dfrac{4}{5}-\left(\dfrac{7}{x}-2\right)\)
f) \(\dfrac{1}{x-1}+\dfrac{-2}{3}\left(\dfrac{3}{4}-\dfrac{6}{5}\right)=\dfrac{5}{2-2x}\)
Tinh:
a) dfrac{7}{8}.left(dfrac{2}{12}+dfrac{4}{10}right)
b) dfrac{3}{2}-dfrac{5}{6}:left(dfrac{1}{2}right)^2+sqrt{4}
c) dfrac{15}{34}+dfrac{7}{21}+dfrac{19}{34}-1dfrac{15}{17}+dfrac{2}{3}
d) left(-2right)^3.left(dfrac{3}{4}-0,25right):left(2dfrac{1}{4}-1dfrac{1}{6}right)
e) 16dfrac{2}{7}:left(-dfrac{3}{5}right)+28dfrac{2}{7}:left(-dfrac{3}{5}right)
GIUP MK T ^ T
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Tinh:
a) \(\dfrac{7}{8}.\left(\dfrac{2}{12}+\dfrac{4}{10}\right)\)
b) \(\dfrac{3}{2}-\dfrac{5}{6}:\left(\dfrac{1}{2}\right)^2+\sqrt{4}\)
c) \(\dfrac{15}{34}+\dfrac{7}{21}+\dfrac{19}{34}-1\dfrac{15}{17}+\dfrac{2}{3}\)
d) \(\left(-2\right)^3.\left(\dfrac{3}{4}-0,25\right):\left(2\dfrac{1}{4}-1\dfrac{1}{6}\right)\)
e) \(16\dfrac{2}{7}:\left(-\dfrac{3}{5}\right)+28\dfrac{2}{7}:\left(-\dfrac{3}{5}\right)\)
GIUP MK T ^ T
19 tháng 9 2017 lúc 12:09
tim x
\(\dfrac{5}{6}x-\dfrac{3}{4}=\dfrac{-1}{4}+\dfrac{2}{3}\)
\(-1\dfrac{1}{2}-\dfrac{2}{3}x=\dfrac{5}{6}-\left(\dfrac{-2}{5}\right)\)
\(\left(\dfrac{4}{5}:x+1,5\right):\dfrac{2}{3}=-1,5\)
\(\dfrac{4}{3}x-\dfrac{2}{3}=\dfrac{1}{4}-x\)
giup minh nhe minh dang can gap
Tính hợp lý:
a, dfrac{-3}{4}.5dfrac{3}{13}-0,75.dfrac{36}{13}
b, 4dfrac{5}{9}:left(dfrac{-5}{7}right)+dfrac{49}{9}:left(dfrac{-5}{7}right)
c, left(dfrac{-3}{5}+dfrac{4}{9}right):dfrac{7}{11}+left(dfrac{-2}{5}+dfrac{5}{9}right):dfrac{7}{11}
d, dfrac{6}{7}:left(dfrac{3}{26}-dfrac{3}{13}right)+dfrac{6}{7}:left(dfrac{1}{10}-dfrac{8}{5}right)
Đọc tiếp
Tính hợp lý:
a, \(\dfrac{-3}{4}.5\dfrac{3}{13}-0,75.\dfrac{36}{13}\)
b, \(4\dfrac{5}{9}:\left(\dfrac{-5}{7}\right)+\dfrac{49}{9}:\left(\dfrac{-5}{7}\right)\)
c, \(\left(\dfrac{-3}{5}+\dfrac{4}{9}\right):\dfrac{7}{11}+\left(\dfrac{-2}{5}+\dfrac{5}{9}\right):\dfrac{7}{11}\)
d, \(\dfrac{6}{7}:\left(\dfrac{3}{26}-\dfrac{3}{13}\right)+\dfrac{6}{7}:\left(\dfrac{1}{10}-\dfrac{8}{5}\right)\)
B= \(\left(3-\dfrac{1}{4}+\dfrac{2}{3}\right)\) - \(\left(5+\dfrac{1}{3}-\dfrac{6}{5}\right)\) - \(\left(6-\dfrac{7}{4}+\dfrac{3}{2}\right)\)
B= 0,25 +3/5 - (1/8-2/5+\(1\dfrac{1}{4}\) )
C=\(\dfrac{2}{3}-\left(\dfrac{-1}{4}\right)+\dfrac{3}{5}-\dfrac{7}{45}-\left(\dfrac{-5}{9}\right)+\dfrac{1}{12}+\dfrac{1}{35}\)
D=\(\left(5-\dfrac{3}{4}+\dfrac{1}{5}\right)-\left(6+\dfrac{7}{4}-\dfrac{8}{5}\right)-\left(2-\dfrac{5}{7}+\dfrac{16}{5}\right)\)
12 tháng 9 2021 lúc 14:28
1. Tính
\(\left(8\dfrac{9}{4}+\dfrac{2}{7}\right)-\left(-6-\dfrac{3}{7}+\dfrac{5}{4}\right)-\left(3+\dfrac{2}{4}-\dfrac{9}{7}\right)\)