\(\dfrac{\text{25}}{12}+\dfrac{-4}{12}=\dfrac{21}{12}\)
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Bài 3: Nhân, chia số hữu tỉ
Các câu hỏi tương tự
-3/4 * 12/-5 * -25/6
Tính:
a) \(\dfrac{-3}{4}.\dfrac{12}{-5}.\left(-\dfrac{25}{6}\right);\) b) \(\left(-2\right).\dfrac{-38}{21}.\dfrac{-7}{4}.\left(-\dfrac{3}{8}\right);\)
c) \(\left(\dfrac{11}{12}:\dfrac{33}{16}\right).\dfrac{3}{5};\) d) \(\dfrac{7}{23}.\left[\left(-\dfrac{8}{6}\right)-\dfrac{45}{18}\right].\)
a) \(\dfrac{-2}{7}.\dfrac{21}{8}\) b) 0.24.\(\dfrac{-15}{4}\)
c) (-2).\(\left(\dfrac{-7}{12}\right)\) d) \(\left(\dfrac{-3}{25}\right):6\)
tính nhanh
a) -5/12+4/37+17/12-41/37
b) 1/2+-3/5:(-1/1/2)-|-2/5|
c)8^15 x 3^16/4^22 x 9^8
d)35/1/6:(-4/5)-45/1/6:(-4/5)
e) (5/12:10/3)+(1/2)^2
1,Tính giá trị biểu thức:
a, A=\(\dfrac{7}{35}+\left(-1\dfrac{3}{4}+\dfrac{12}{7}\right)-\left(\dfrac{1}{4}-\dfrac{2}{7}-\dfrac{13}{35}\right)-\dfrac{3}{7}\)
b, B=\(\sqrt{\dfrac{25}{16}-}\dfrac{\left(-3\right)^2}{\left|-4\right|}+\dfrac{\sqrt{\left(-7\right)^2}}{4}-3.\left(\dfrac{5}{2}\right)^2\)
Tính :
a) -dfrac{3}{4}.31dfrac{11}{23}-0.75.8dfrac{12}{23}
b) left(2dfrac{1}{3}+3dfrac{1}{2}right):left(-4dfrac{1}{6}+3dfrac{1}{7}right)+7dfrac{1}{2}
c) 4dfrac{5}{9}:left(dfrac{-5}{7}right)+5dfrac{4}{9}:left(dfrac{-5}{7}right)
d) 4dfrac{25}{16}+25left(dfrac{9}{16}:dfrac{125}{64}:dfrac{-27}{8}right)
e) dfrac{2}{3}-4left(dfrac{1}{2}+dfrac{3}{4}right)
Đọc tiếp
Tính :
a) \(-\dfrac{3}{4}.31\dfrac{11}{23}-0.75.8\dfrac{12}{23}\)
b) \(\left(2\dfrac{1}{3}+3\dfrac{1}{2}\right):\left(-4\dfrac{1}{6}+3\dfrac{1}{7}\right)+7\dfrac{1}{2}\)
c) \(4\dfrac{5}{9}:\left(\dfrac{-5}{7}\right)+5\dfrac{4}{9}:\left(\dfrac{-5}{7}\right)\)
d) \(4\dfrac{25}{16}+25\left(\dfrac{9}{16}:\dfrac{125}{64}:\dfrac{-27}{8}\right)\)
e) \(\dfrac{2}{3}-4\left(\dfrac{1}{2}+\dfrac{3}{4}\right)\)
Cho 6 x - 12 y chia 9 = 8 z - 6 x 4 = 12 x - 8 chia 6 Tìm x y z biết 2x + z - y = 36
Xem chi tiết
a \(\dfrac{5}{4}\).\(\dfrac{-12}{7}\)
b \(\dfrac{-4}{3}\):\(\dfrac{13}{9}\)
c \(\dfrac{-5}{7}\).\(\dfrac{49}{3}\):\(\dfrac{7}{-6}\)
d (\(-\dfrac{9}{25}\)):6
Tính:
a) \(\dfrac{-2}{7}.\dfrac{21}{8};\) b) \(0,24.\dfrac{-15}{4}\)
c) \(\left(-2\right).\left(-\dfrac{7}{12}\right)\) d) \(\left(-\dfrac{3}{25}\right):6\)
Tìm x biết:
2014.|x-12|+\(^{\left(x-12\right)^2}\)= 2013.|12-x|