Ta có 5\(\dfrac{1}{5}\)=5\(\dfrac{3}{15}\)
Từ đó ta tìm đc các phần nguyên của x là :5;6;7;8
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Đại số lớp 6
Các câu hỏi tương tự
BT1: Tính nhanh
1) \(\left(\dfrac{-4}{9}+\dfrac{3}{7}\right):1\dfrac{1}{15}+\left(\dfrac{4}{7}-\dfrac{5}{9}\right):1\dfrac{1}{15}\)
2) \(3\dfrac{2}{9}.15\dfrac{4}{7}-3\dfrac{2}{9}.8\dfrac{1}{7}+3\dfrac{2}{9}.\dfrac{15}{7}-3\dfrac{2}{9}.\dfrac{1}{7}\)
thực hiện phép tính( hợp lí nếu có thể)
dfrac{-5}{9}+1dfrac{5}{9}.left(dfrac{3}{4}-dfrac{2}{5}right):7^2
1dfrac{13}{15}.0,75-left(dfrac{104}{195}+25%right).dfrac{24}{47}-3dfrac{12}{13}:3
1dfrac{13}{15}.left(0,5right)^2.3+left(dfrac{8}{15}-1dfrac{19}{60}right):1dfrac{23}{24}
tìm x
60%x+0,4x+x:32
-2x-dfrac{-3}{5}:left(0,5right)^2-1dfrac{1}{4}
left(dfrac{2}{3}-xright):dfrac{3}{4}dfrac{1}{5}
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thực hiện phép tính( hợp lí nếu có thể)
\(\dfrac{-5}{9}+1\dfrac{5}{9}.\left(\dfrac{3}{4}-\dfrac{2}{5}\right):7^2\)
\(1\dfrac{13}{15}.0,75-\left(\dfrac{104}{195}+25\%\right).\dfrac{24}{47}-3\dfrac{12}{13}:3\)
\(1\dfrac{13}{15}.\left(0,5\right)^2.3+\left(\dfrac{8}{15}-1\dfrac{19}{60}\right):1\dfrac{23}{24}\)
tìm x
\(60\%x+0,4x+x:3=2\)
\(-2x-\dfrac{-3}{5}:\left(0,5\right)^2=-1\dfrac{1}{4}\)
\(\left(\dfrac{2}{3}-x\right):\dfrac{3}{4}=\dfrac{1}{5}\)
\(\dfrac{-3}{4}x\dfrac{4}{7}+\dfrac{-3}{5}x\dfrac{3}{7}-\dfrac{2}{5}\)
\(\left(\dfrac{3}{4}x\dfrac{5}{6}-\dfrac{7}{12}\right)x\left(\dfrac{-12}{7}\right)\)
\(1,4x\dfrac{15}{19}x\left(\dfrac{4}{5}x\dfrac{-2}{3}\right)+\dfrac{7}{15}\)
Tính nha
Tính nhanh:
13) \(\dfrac{45}{8}\left(\dfrac{4}{15}-\dfrac{7}{8}\right)+\dfrac{45}{8}\left(\dfrac{11}{15}+\dfrac{9}{8}\right)\)
14) \(\dfrac{15}{7}\left(\dfrac{49}{35}-\dfrac{27}{8}\right)-\left(\dfrac{2}{5}-\dfrac{27}{4}\right):\dfrac{7}{15}\)
1, Tính
-2dfrac{1}{4}.left(3dfrac{5}{12}-1dfrac{2}{9}right)
left(-25%+0,75+dfrac{7}{12}right):left(-2dfrac{1}{8}right)
2, Tính nhanh
dfrac{4}{9}.19dfrac{1}{3}-dfrac{4}{9}.39dfrac{1}{3} | 19dfrac{5}{8}:dfrac{7}{12}-15dfrac{1}{4}.dfrac{12}{7}
dfrac{-5}{7}.dfrac{5}{11}+dfrac{-5}{7}.dfrac{2}{11}-dfrac{5}{7}:dfrac{11}{14} | dfrac{4}{7}.dfrac{89}{5}-dfrac{4}{5}.dfrac{82}{7}
dfrac{5}{7}.dfrac{-4}{19}+dfrac{-15}{7}.dfrac{5}{19}...
Đọc tiếp
1, Tính
\(-2\dfrac{1}{4}.\left(3\dfrac{5}{12}-1\dfrac{2}{9}\right)\)
\(\left(-25\%+0,75+\dfrac{7}{12}\right):\left(-2\dfrac{1}{8}\right)\)
2, Tính nhanh
\(\dfrac{4}{9}.19\dfrac{1}{3}-\dfrac{4}{9}.39\dfrac{1}{3}\) | \(19\dfrac{5}{8}:\dfrac{7}{12}-15\dfrac{1}{4}.\dfrac{12}{7}\)
\(\dfrac{-5}{7}.\dfrac{5}{11}+\dfrac{-5}{7}.\dfrac{2}{11}-\dfrac{5}{7}:\dfrac{11}{14}\) | \(\dfrac{4}{7}.\dfrac{89}{5}-\dfrac{4}{5}.\dfrac{82}{7}\)
\(\dfrac{5}{7}.\dfrac{-4}{19}+\dfrac{-15}{7}.\dfrac{5}{19}\) | \(8\dfrac{2}{7}-\left(3\dfrac{4}{9}+4\dfrac{2}{7}\right)\)
- Giải hộ với ạ, mấy anh, chị lớp 7,8 cũng được huhu :(( sáng mai nộp đề cương rồi. Làm ơn đi a
Muốn gì cũng hậu tạ :>
Các bn ơi giúp mk vs nha mấy bn!!
Câu 1: Tìm x, biết
a, x dfrac{1}{4} + dfrac{2}{13}
b, dfrac{x}{3} dfrac{2}{3} + dfrac{-1}{7} +
Câu 3: Tính nhanh:
a, dfrac{-2}{5} +dfrac{3}{-4} + dfrac{6}{7} + dfrac{3}{4} + dfrac{2}{5}
b, dfrac{7}{15} + dfrac{4}{-9} + dfrac{-2}{11} + dfrac{8}{15} + dfrac{-5}{9}
c, dfrac{-5}{7} + dfrac{5}{13} +dfrac{-20}{41} + dfrac{8}{13} + dfrac{-21}{41}
Đọc tiếp
Các bn ơi giúp mk vs nha mấy bn!!
Câu 1: Tìm x, biết
a, x = \(\dfrac{1}{4}\) + \(\dfrac{2}{13}\)
b, \(\dfrac{x}{3}\) = \(\dfrac{2}{3}\) + \(\dfrac{-1}{7}\) +
Câu 3: Tính nhanh:
a, \(\dfrac{-2}{5}\) +\(\dfrac{3}{-4}\) + \(\dfrac{6}{7}\) + \(\dfrac{3}{4}\) + \(\dfrac{2}{5}\)
b, \(\dfrac{7}{15}\) + \(\dfrac{4}{-9}\) + \(\dfrac{-2}{11}\) + \(\dfrac{8}{15}\) + \(\dfrac{-5}{9}\)
c, \(\dfrac{-5}{7}\) + \(\dfrac{5}{13}\) +\(\dfrac{-20}{41}\) + \(\dfrac{8}{13}\) + \(\dfrac{-21}{41}\)
BT2: Tính nhanh
3) \(\dfrac{2}{3}-\left(-\dfrac{1}{4}\right)+\dfrac{3}{5}-\dfrac{7}{45}-\left(-\dfrac{5}{9}\right)+\dfrac{1}{12}+\dfrac{1}{90}\)
4) B = \(\dfrac{1}{3}-\dfrac{3}{4}-\left(-\dfrac{3}{5}\right)+\dfrac{1}{64}-\dfrac{2}{9}-\dfrac{1}{36}+\dfrac{1}{15}\)
Giúp mk nhé các bạn!
Tìm số nguyên x ,biết :
a) \(\dfrac{x}{5} = \dfrac{-3}{15}\)
b) -3x + 15 = 9
BT1: Tính
1) \(3\dfrac{1}{2}+15\dfrac{4}{9}:\dfrac{26}{7}-2\dfrac{4}{9}:\dfrac{26}{7}\)
2) \(34.\left(2\dfrac{1}{17}-3\dfrac{5}{24}\right)+\dfrac{1}{2}\)