Ôn tập toán 6
Các câu hỏi tương tự
Bài 1 : So sánh
\(\left(\frac{1}{10}\right)^{15}\) và \(\left(\frac{3}{10}\right)^{20}\)
Bài 2 : So sánh
A = \(\left(\frac{13^{15}+1}{13^{16}+1}\right)\) và B = \(\left(\frac{13^{16}+1}{13^{17}+1}\right)\)
a) \(56+\left(-29\right)+\left(-7\right)+28+13+\left(-35\right)\)
b) \(\left(-213\right)+186+\left(-14\right)+217+54+\left(-49\right)\)
c)\(435+\left(-43\right)+\left(-483\right)+\left(-57\right)+383+\left(-415\right)\)
BT3: Tìm x, biết
13) \(\left(-1\dfrac{1}{5}+x\right):\left(-3\dfrac{3}{5}\right)=\dfrac{-7}{4}+\dfrac{1}{4}:\dfrac{1}{8}\)
14) \(\dfrac{11}{13}-\left(\dfrac{5}{42}-x\right)=-\left(\dfrac{15}{28}-\dfrac{11}{13}\right)\)
BT2: Tính nhanh
13) \(\dfrac{4}{9}:\left(-\dfrac{1}{7}\right)+6\dfrac{5}{9}:\left(-\dfrac{1}{7}\right)\)
14) \(\left(-\dfrac{3}{4}+\dfrac{5}{13}\right):\dfrac{2}{7}-\left(2\dfrac{1}{4}+\dfrac{8}{13}\right):\dfrac{2}{7}\)
Bài 2 : Tính :
a) 24 . 5 - \(\left[131.\left(13-4\right)^2\right]\)
b) 100 : \(\left\{230:\left[450-\left(4-5^3-5^2.25\right)\right]\right\}\)
c) 30 . \(\left\{175:\left[355-\left(135+37.5\right)\right]\right\}\)
Rút gọn p/số:
a/ \(\frac{2.\left(-13\right).9.10}{\left(-3\right).4.\left(-5\right).26}\)
b/ \(\frac{15.8+15.4}{12.3}\)
\(\dfrac{-5}{9}+1\dfrac{5}{9}\cdot\left(\dfrac{3}{4}-\dfrac{2}{5}\right):7^2\)
\(1\dfrac{13}{15}\cdot0,75-\left(\dfrac{104}{195}+25\%\right)\cdot\dfrac{24}{47}-3\dfrac{12}{13}:3\)
\(1\dfrac{13}{15}\cdot\left(0,5\right)^2\cdot3+\left(\dfrac{8}{15}+1\dfrac{19}{60}\right):1\dfrac{23}{24}\)
12 tháng 8 2017 lúc 8:43
thực hiện phép tính
a,dfrac{2}{3}-dfrac{3}{5}divleft(-1dfrac{1}{5}right)+left(dfrac{-2}{3}right)timesdfrac{3}{8}
b,17dfrac{11}{9}-left(6dfrac{3}{13}+7dfrac{11}{19}right)+left(10dfrac{3}{13}-5dfrac{1}{4}right)
c,left(dfrac{-3}{2}right)^2-left[-2dfrac{1}{3}-left(dfrac{3}{4}+dfrac{1}{3}right)div2dfrac{3}{5}right]timesleft(dfrac{-3}{4}right)
d,dfrac{21}{33}divdfrac{11}{5}-dfrac{13}{33}divdfrac{11}{5}+dfrac{25}{33}divdfrac{11}{5}+dfrac{6}{11}
giúp mình nhé
Đọc tiếp
thực hiện phép tính
a,\(\dfrac{2}{3}-\dfrac{3}{5}\div\left(-1\dfrac{1}{5}\right)+\left(\dfrac{-2}{3}\right)\times\dfrac{3}{8}\)
b,\(17\dfrac{11}{9}-\left(6\dfrac{3}{13}+7\dfrac{11}{19}\right)+\left(10\dfrac{3}{13}-5\dfrac{1}{4}\right)\)
c,\(\left(\dfrac{-3}{2}\right)^2-\left[-2\dfrac{1}{3}-\left(\dfrac{3}{4}+\dfrac{1}{3}\right)\div2\dfrac{3}{5}\right]\times\left(\dfrac{-3}{4}\right)\)
d,\(\dfrac{21}{33}\div\dfrac{11}{5}-\dfrac{13}{33}\div\dfrac{11}{5}+\dfrac{25}{33}\div\dfrac{11}{5}+\dfrac{6}{11}\)
giúp mình nhé
Rút gọn các biểu thức sau;
\(\dfrac{-5}{12}.\dfrac{2}{7}+\dfrac{7}{12}.\dfrac{-3}{14}\)
b)\(\dfrac{2.\left(-13\right).9.10}{\left(-3\right).4.\left(-5\right).26}\)
c) 1.\(\dfrac{13}{15}-0,75-\)(\(\dfrac{104}{195}+25\%\)).\(\dfrac{24}{47}-3\dfrac{12}{13}:3\)