Đại số lớp 7
Các câu hỏi tương tự
Bài 1: Thực hiện phép tính:
1, 4/23 + 5/21 + 0,5 - 4/23 + 16/21
2, (1/3 + 12/67 + 13/41)-(79/67 - 28/41)
3, 12,5 x (-5/7)+1,5 x (-5/7)
4, 3/8x19 1/3- 3/8x33 1/3
5, 5/7x(-3/11)+5/7x(-8/11)+2 5/7
6, (-5/11:13/8-5/11:13/5)- giá trị tuyệt đối của -1/33
Tìm x \(\in\) Z biết :
a ) \(\dfrac{1}{2}-\) (\(\dfrac{1}{2}-\dfrac{3}{2}\) ) \(\le x\le\dfrac{37}{24}-\left(\dfrac{1}{8}-\dfrac{2}{3}\right)\)
b ) \(\dfrac{-1}{23}+\dfrac{9}{-69}-\dfrac{7}{23}< \dfrac{x}{23}\le\dfrac{2}{46}-\dfrac{8}{23}\)
giúp mình với
Tính
a. \(\frac{\left(13\frac{1}{4}-2\frac{5}{7}-10\frac{5}{6}\right).230\frac{1}{25}+46\frac{3}{4}}{\left(1\frac{3}{10}+\frac{10}{3}\right):\left(12\frac{1}{3}-14\frac{2}{7}\right)}\)
c) 7/23 x [(-8/6) - 45/18]d) 23 1/4: 7/5 - 13 1/4 : 5/7e) 25 x 153 / 63 x 102l) (1/3)10 x (9)25 - (2/3)10 : (4/9)5i) (-5)7 x (-1/5)7 + 0.56 x (-2)6
Đọc tiếp
c) 7/23 x [(-8/6) - 45/18]
d) 23 1/4: 7/5 - 13 1/4 : 5/7
e) 25 x 153 / 63 x 102
l) (1/3)10 x (9)25 - (2/3)10 : (4/9)5
i) (-5)7 x (-1/5)7 + 0.56 x (-2)6
1. Tìm x:
a;\(\frac{x+1}{3}=\frac{x-2}{4}\)
b;\(\frac{x-6}{7}+\frac{x-7}{8}+\frac{x-8}{9}=\frac{x-9}{10}+\frac{x-10}{11}+\frac{x-11}{12}\)
c;\(\frac{x+3}{11}+\frac{x+23}{12}=\frac{x+38}{13}+\frac{x+27}{14}\)
c) 7/23 x [(-8/6) - 45/18]d) 23frac{1}{4} : frac{7}{5} - 13frac{1}{4} : frac{5}{7}e) 25 x 153 / 63 x 102l) (1/3)10 x (9)25 - (2/3)10 : (4/9)5i) (-5)7 x (-1/5)7 + 0.56 x (-2)6Các bạn làm nhanh giùm mình
Đọc tiếp
c) 7/23 x [(-8/6) - 45/18]
d) 23\(\frac{1}{4}\) : \(\frac{7}{5}\) - 13\(\frac{1}{4}\) : \(\frac{5}{7}\)
e) 25 x 153 / 63 x 102
l) (1/3)10 x (9)25 - (2/3)10 : (4/9)5
i) (-5)7 x (-1/5)7 + 0.56 x (-2)6
Các bạn làm nhanh giùm mình
giải hộ milk bài này nha
\(\frac{\left(13\frac{1}{4}-2\frac{5}{7}-10\frac{5}{6}\right)\times230\frac{1}{25}+46\frac{3}{4}}{\left(1\frac{3}{7}+\frac{10}{3}\right)\div\left(12\frac{1}{3}-14\frac{2}{7}\right)}\)
giải hộ milk nha cảm ơn rất nhiều
Thực hiện phép tính:
a) 1dfrac{4}{23}+dfrac{5}{21}-dfrac{4}{23}+0,5+dfrac{16}{21}
b) dfrac{3}{7}.19dfrac{1}{3}-dfrac{3}{7}.33dfrac{1}{3}
c) left(15dfrac{1}{4}+2010right):left(-dfrac{5}{7}right)-left(25dfrac{1}{4}+2016right):left(-dfrac{5}{7}right)
d) left(2017-dfrac{3}{7}+dfrac{9}{11}right)-left(2016-dfrac{3}{7}+dfrac{8}{17}right)-left(2015+dfrac{9}{11}-dfrac{8}{17}right)
Đọc tiếp
Thực hiện phép tính:
a) \(1\dfrac{4}{23}+\dfrac{5}{21}-\dfrac{4}{23}+0,5+\dfrac{16}{21}\)
b) \(\dfrac{3}{7}.19\dfrac{1}{3}-\dfrac{3}{7}.33\dfrac{1}{3}\)
c) \(\left(15\dfrac{1}{4}+2010\right):\left(-\dfrac{5}{7}\right)-\left(25\dfrac{1}{4}+2016\right):\left(-\dfrac{5}{7}\right)\)
d) \(\left(2017-\dfrac{3}{7}+\dfrac{9}{11}\right)-\left(2016-\dfrac{3}{7}+\dfrac{8}{17}\right)-\left(2015+\dfrac{9}{11}-\dfrac{8}{17}\right)\)
B1
(-1/2)-(-3/5)+(-1/9)+1/131-(-2/7)+4/35-7/18
B2
A=1/3-3/5+5/7-7/9+9/11-11/13+13/15+11/13-9/11+7/9-5/7+3/5-1/3
B=1/99-1/99.98-1/98.97-1/97.96-...-1/3.2-1/2.1
gia tri cua bieu thuc : B=\(\dfrac{-1:1\dfrac{1}{15}}{3\dfrac{1}{8}:6\dfrac{2}{3}}\): \(\dfrac{4\dfrac{7}{8}:13}{5:1\dfrac{7}{8}}\): \(\dfrac{1}{3^2}\)