Ôn tập chương 1
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\(0,4.\left(3\right)+0,6\left(2\right).2\frac{1}{2}-\frac{\frac{1}{2}+\frac{1}{3}}{0,6\left(8\right)}:\frac{50}{53}\)
giúp mik nhé
bài 1 mọi người làm ơn giúp mình
a,left(frac{-2}{5}+frac{1}{3}right).frac{30}{7}-left(frac{-1}{2}right)^2
b,left(frac{-1}{2}-frac{2}{3}right)^2.frac{72}{5}+left(frac{-4}{5}right)^2.frac{25}{16}
c,left(1frac{2}{3}+50%right):frac{3}{12}-left(frac{-3}{7}right)^2:frac{-3}{7}
d,left|frac{-1}{2}right|.frac{4}{3}-1,2:left(frac{-6}{5}right)^2
Đọc tiếp
bài 1 mọi người làm ơn giúp mình
a,\(\left(\frac{-2}{5}+\frac{1}{3}\right).\frac{30}{7}-\left(\frac{-1}{2}\right)^2\)
b,\(\left(\frac{-1}{2}-\frac{2}{3}\right)^2.\frac{72}{5}+\left(\frac{-4}{5}\right)^2.\frac{25}{16}\)
c,\(\left(1\frac{2}{3}+50\%\right):\frac{3}{12}-\left(\frac{-3}{7}\right)^2:\frac{-3}{7}\)
d,\(\left|\frac{-1}{2}\right|.\frac{4}{3}-1,2:\left(\frac{-6}{5}\right)^2\)
a)3,6-left|x-0,4right|0
b)frac{x}{2}yfrac{z}{3} và x-2y+z210
c)left|x+0,25right|-4frac{1}{4}
d)x:left(0,25right)^4left(0,5right)^2
e)3^{x-1}+5.3^{x-1}162
f)frac{x}{-25}frac{2}{5}
g)left|x+frac{3}{4}right|-frac{3}{4}sqrt[]{frac{1}{9}}
Đọc tiếp
a)\(3,6-\left|x-0,4\right|=0\)
b)\(\frac{x}{2}=y=\frac{z}{3}\) và \(x-2y+z=210\)
c)\(\left|x+0,25\right|-4=\frac{1}{4}\)
d)\(x:\left(0,25\right)^4=\left(0,5\right)^2\)
e)\(3^{x-1}+5.3^{x-1}=162\)
f)\(\frac{x}{-25}=\frac{2}{5}\)
g)\(\left|x+\frac{3}{4}\right|-\frac{3}{4}=\sqrt[]{\frac{1}{9}}\)
Bài 1: Thực hiện phép tính:
a) left(frac{3}{5}right)^2-[frac{1}{3}:3-sqrt{16}.left(frac{1}{2}right)^2]-left(10times12-2014right)^0
b)|-frac{100}{123}|:left(frac{3}{4}+frac{7}{12}right)+frac{23}{123}:left(frac{9}{5}-frac{7}{15}right)
c) frac{left(-5right)^{32}times20^{43}}{left(-8right)^{29}times125^{25}}
Bài 2: Tìm x biết
a)frac{2}{3}-left(frac{3}{4}-xright)sqrt{frac{1}{9}}
b) left(frac{1}{2}-xright)^2left(-2right)^2
c) |3x+frac{1}{2}|-frac{2}{3}1
d) 3^{2x+1}81
Đọc tiếp
Bài 1: Thực hiện phép tính:
a) \(\left(\frac{3}{5}\right)^2-[\frac{1}{3}:3-\sqrt{16}.\left(\frac{1}{2}\right)^2]-\left(10\times12-2014\right)^0\)
b)\(|-\frac{100}{123}|:\left(\frac{3}{4}+\frac{7}{12}\right)+\frac{23}{123}:\left(\frac{9}{5}-\frac{7}{15}\right)\)
c) \(\frac{\left(-5\right)^{32}\times20^{43}}{\left(-8\right)^{29}\times125^{25}}\)
Bài 2: Tìm x biết
a)\(\frac{2}{3}-\left(\frac{3}{4}-x\right)=\sqrt{\frac{1}{9}}\)
b) \(\left(\frac{1}{2}-x\right)^2=\left(-2\right)^2\)
c) \(|3x+\frac{1}{2}|-\frac{2}{3}=1\)
d) \(3^{2x+1}=81\)
bài 2 giúp đi mọi người
a,\(\frac{-2}{5}+x=\left(\frac{-1}{3}\right)^2+\frac{2}{3}\)
b,\(\frac{3}{5}-2x=\left(\frac{-3}{5}\right)^2+:\frac{9}{25}\)
c,\(\left|2x-1\right|=\frac{1}{2}-\frac{-2}{3}\)
d,\(\left(x-\frac{3}{4}\right).\frac{1}{2}=\left(\frac{-1}{2}\right)^2\)
Tính nhanh:
A= \(\frac{\left(1+2+3+....+99+100\right).\left(\frac{1}{2}-\frac{1}{3}-\frac{1}{7}-\frac{1}{9}\right).\left(63.1,2-21.3.6\right)}{1-2+3-4+...+99-100}\)
a)\(\left(1-\frac{2}{5}\right)^2+\left|\frac{-3}{5}\right|+\frac{-7}{10}\)
b)\(\frac{6^{15}.9^{10}}{3^{34}.2^{13}}\)
c)\(\frac{\left(-5\right)^{32}.20^{43}}{\left(-8\right)^{29}.125^{25}}\)
bài 1:
\(a,\frac{3}{8}+\frac{-5}{6}\)
b, \(\frac{15}{12}-\frac{-1}{4}\)
bài 2:
a,\(\frac{-1}{12}-\left(2\frac{5}{8}-\frac{1}{3}\right)\) c, \(-1,75-\left(\frac{-1}{9}-2\frac{1}{18}\right)\)
b, \(\frac{-5}{6}-\left[\frac{-3}{8}+\frac{1}{10}\right]\) d,
a,left(frac{2^2}{5}right)+5frac{1}{2}.(4,5-2,5)+frac{2^3}{-4}
b,left(-2^3right)+frac{1}{2}:frac{1}{8}-sqrt{25}+|-64|
c,frac{sqrt{3^2+sqrt{39}^2}}{sqrt{91^2}-sqrt{left(-7^2right)}}
d,left(-2^2right)+sqrt{36}-sqrt{9}+sqrt{25}20.20)
e,sqrt{25}-3sqrt{frac{4}{9}}
h,left(-3^2right).frac{1}{3}-sqrt{49}+left(5^3right):sqrt{25}
Đọc tiếp
a,\(\left(\frac{2^2}{5}\right)\)+\(5\frac{1}{2}\).(4,5-2,5)+\(\frac{2^3}{-4}\)
b,\(\left(-2^3\right)\)+\(\frac{1}{2}\):\(\frac{1}{8}\)-\(\sqrt{25}\)+|-64|
c,\(\frac{\sqrt{3^2+\sqrt{39}^2}}{\sqrt{91^2}-\sqrt{\left(-7^2\right)}}\)
d,\(\left(-2^2\right)+\sqrt{36}-\sqrt{9}+\sqrt{25}20.20\))
e,\(\sqrt{25}-3\sqrt{\frac{4}{9}}\)
h,\(\left(-3^2\right)\).\(\frac{1}{3}\)-\(\sqrt{49}\)+\(\left(5^3\right)\):\(\sqrt{25}\)