Ôn tập toán 6
Các câu hỏi tương tự
BT2: Tính nhanh
9) (\(\left(5+\dfrac{1}{5}-\dfrac{2}{9}\right)-\left(2-\dfrac{1}{23}-2\dfrac{3}{35}+\dfrac{5}{6}\right)-\left(8+\dfrac{2}{7}-\dfrac{1}{18}\right)\)
10)\(\dfrac{1}{3}-\dfrac{3}{4}-\left(-\dfrac{3}{5}\right)+\dfrac{1}{64}-\dfrac{2}{9}-\dfrac{1}{36}+\dfrac{1}{15}\)
Tính:
a. 75% - 1dfrac{1}{2}.dfrac{4}{3} + 1,5 : dfrac{-9}{4}- (-dfrac{1}{2})2
b. dfrac{-4}{9}.dfrac{6}{13} + 7dfrac{4}{9} - dfrac{4}{9}:dfrac{13}{7}-5dfrac{4}{9} - 2
Tìm x:
a. dfrac{7}{12}-left(x+dfrac{7}{10}right):dfrac{6}{5}dfrac{-5}{4}
b. x in Z, -1 le dfrac{x}{5} 0
*Lm nhanh nha, mk cần gấp
Đọc tiếp
Tính:
a. 75% - 1\(\dfrac{1}{2}\).\(\dfrac{4}{3}\) + 1,5 : \(\dfrac{-9}{4}\)- (-\(\dfrac{1}{2}\))2
b. \(\dfrac{-4}{9}\).\(\dfrac{6}{13}\) + 7\(\dfrac{4}{9}\) - \(\dfrac{4}{9}:\dfrac{13}{7}-5\dfrac{4}{9}\) - 2
Tìm x:
a. \(\dfrac{7}{12}-\left(x+\dfrac{7}{10}\right):\dfrac{6}{5}=\dfrac{-5}{4}\)
b. x \(\in\) Z, -1 \(\le\) \(\dfrac{x}{5}\) < 0
*Lm nhanh nha, mk cần gấp
Bài 1: Tìm x biết: a) dfrac{2}{5} . x - dfrac{1}{4} dfrac{1}{10} b) dfrac{3}{5} dfrac{24}{x} c) (2.x - 3)^2 16
Bài 2: Thực hiện các phép tính:
a)25% - 4dfrac{2}{5} + 0,3 :dfrac{6}{5} b) (dfrac{1}{6} - dfrac{1}{5^2} . 5 + dfrac{1}{30} ) . (dfrac{2011}{2010} + dfrac{2010}{1009} + dfrac{2009}{2008})
Bài 3: Thực hiện tính nhanh:
a)dfrac{4}{19}.dfrac{-3}{7}+dfrac{-3}{7}.dfrac{15}{19}+dfrac{5}{7} b) 7dfrac{5}{9}-left(2dfrac{3}{4}+3dfrac{5}{9}right)
Bài 5: Tính tổn...
Đọc tiếp
Bài 1: Tìm x biết: a) \(\dfrac{2}{5}\) . x - \(\dfrac{1}{4}\) = \(\dfrac{1}{10}\) b) \(\dfrac{3}{5}\) = \(\dfrac{24}{x}\) c) (2.x - 3)\(^2\) = 16
Bài 2: Thực hiện các phép tính:
a)25% - 4\(\dfrac{2}{5}\) + 0,3 :\(\dfrac{6}{5}\) b) (\(\dfrac{1}{6}\) - \(\dfrac{1}{5^2}\) . 5 + \(\dfrac{1}{30}\) ) . (\(\dfrac{2011}{2010}\) + \(\dfrac{2010}{1009}\) + \(\dfrac{2009}{2008}\))
Bài 3: Thực hiện tính nhanh:
a)\(\dfrac{4}{19}.\dfrac{-3}{7}+\dfrac{-3}{7}.\dfrac{15}{19}+\dfrac{5}{7}\) b) \(7\dfrac{5}{9}-\left(2\dfrac{3}{4}+3\dfrac{5}{9}\right)\)
Bài 5: Tính tổng sau:
\(\dfrac{4}{12.14}+\dfrac{4}{14.16}+\dfrac{4}{16.18}+...+\dfrac{4}{58.60}\)
HELP ME!! Mk đang cần gấp. Ai nhanh, đầy đủ mk tick cho!
Bài 1; Tính
a)left(dfrac{5}{18}-dfrac{7}{24}+dfrac{1}{9}right):dfrac{7}{18}
b)left(dfrac{7}{20}-dfrac{5}{16}+dfrac{3}{40}right):left(dfrac{4}{15}-dfrac{3}{10}+dfrac{1}{12}right)
Bài 2:Tìm x
a)dfrac{3}{10}-xdfrac{5}{6}-dfrac{2}{15}
b)dfrac{-5}{8}+xdfrac{4}{9}-dfrac{7}{1}
c)dfrac{2}{x-3}dfrac{x-3}{18}
Giúp mk zới m.n mk gấp lắm mk tick cho
Đọc tiếp
Bài 1; Tính
a)\(\left(\dfrac{5}{18}-\dfrac{7}{24}+\dfrac{1}{9}\right):\dfrac{7}{18}\)
b)\(\left(\dfrac{7}{20}-\dfrac{5}{16}+\dfrac{3}{40}\right):\left(\dfrac{4}{15}-\dfrac{3}{10}+\dfrac{1}{12}\right)\)
Bài 2:Tìm x
a)\(\dfrac{3}{10}-x=\dfrac{5}{6}-\dfrac{2}{15}\)
b)\(\dfrac{-5}{8}+x=\dfrac{4}{9}-\dfrac{7}{1}\)
c)\(\dfrac{2}{x-3}=\dfrac{x-3}{18}\)
Giúp mk zới m.n mk gấp lắm mk tick cho
Tính rồi tìm số nghịch đảo của :
\(\dfrac{2}{3}.\dfrac{4}{5}.\dfrac{6}{7}.\dfrac{8}{9}.\dfrac{10}{11}.\dfrac{1}{2}.\dfrac{3}{4}.\dfrac{5}{6}.\dfrac{7}{8}.\dfrac{9}{10}\)
BT2: Tính nhanh
13) \(\dfrac{4}{9}:\left(-\dfrac{1}{7}\right)+6\dfrac{5}{9}:\left(-\dfrac{1}{7}\right)\)
14) \(\left(-\dfrac{3}{4}+\dfrac{5}{13}\right):\dfrac{2}{7}-\left(2\dfrac{1}{4}+\dfrac{8}{13}\right):\dfrac{2}{7}\)
tính nhanh
B = ( \(5\dfrac{9}{10}:\dfrac{3}{2}-\left(2\dfrac{1}{3}.4\dfrac{1}{2}-2.2\dfrac{1}{3}\right):\dfrac{7}{4}\)
Ai biết thì làm nhanh giúp mik nha
chieu nay mik đi hok rùi
tìm x
\([\dfrac{6:\dfrac{3}{5}-1\dfrac{1}{16}.\dfrac{16}{7}}{4\dfrac{1}{5}-\dfrac{10}{11}+5\dfrac{2}{11}}-\dfrac{\left(\dfrac{3}{20}+\dfrac{1}{2}-\dfrac{1}{5}\right).\dfrac{12}{49}}{3\dfrac{1}{3}+\dfrac{2}{9}}].x=2\dfrac{23}{96}\)
BT2: Tính nhanh
7) \(\left(-\dfrac{1}{2}\right)-\left(-\dfrac{3}{5}\right)+\left(-\dfrac{1}{9}\right)+\dfrac{1}{71}-\left(-\dfrac{2}{7}\right)+\dfrac{4}{35}-\dfrac{7}{18}\)
8)\(\left(3-\dfrac{1}{4}+\dfrac{2}{3}\right)-\left(5-\dfrac{1}{3}-\dfrac{6}{5}\right)-\left(6-\dfrac{7}{4}+\dfrac{3}{2}\right)\)