bài này dễ
(-5)+2+|-3|+|-2|=-5+2+3+2=2
Ta có: ( -5) + 2 + | -3 | + | -2 |
= ( -5) + 2 + 3 + 2
= 2
Tính:
\(a)\left(-2x^2\right)\cdot\left(3x-4x^3+7-x^2\right)\)
\(b)\left(x+3\right)\cdot\left(2x^2-3x-5\right)\)
\(c)\left(-6x^5+7x^4-6x^3\right):3x^3\)
\(d)\left(9x^2-4\right):\left(3x+2\right)\)
\(e)\left(2x^4-13x^3+15x^2+11x-3\right):\left(x^2-4x-3\right)\)
Tính
a) \(\dfrac{13}{50}.\left(-15.5\right):\dfrac{13}{50}.84\dfrac{1}{2}\)
b) \(\dfrac{\left(-0,7\right)^2.\left(-5\right)^3}{\left(-2\dfrac{1}{3}\right)^3.\left(1\dfrac{1}{2}\right)^4.\left(-1\right)^5}\)
bài 2;tính
\(\left[\left(0,15\right)^3\right]^0+\left[\left(\frac{1}{7}\right)^2\right]^{-1}.\left[\left(-2\right)^3\right]^2:2^5\)
Tính : \(\frac{\left(\frac{2}{3}\right)^3.\left(-\frac{3}{4}\right)^2.\left(-1\right)^3}{\left(\frac{2}{5}\right)^2.\left(-\frac{5}{12}\right)^3}\)
Tính
\(\left(-19\right)+5\left(-8\right)+19+\left(-3\right).\left(-2\right)^3\)
Thực hiện phép tính
a) \(\left[6.\left(-\frac{1}{3}\right)^2-3.\left(-\frac{1}{3}\right)+1\right]:\left(-\frac{1}{3}-1\right)\)
b) \(\frac{\left(\frac{2}{3}\right)^3.\left(-\frac{3}{4}\right)^2.\left(-1\right)^{2003}}{\left(\frac{2}{5}\right)^2.\left(-\frac{5}{12}\right)^3}\)
Thực hiện phép tính
c) \(\left[\left(\frac{4}{3}\right)^{-3}\left(\frac{3}{4}\right)^6\right]:\left(\frac{3}{2}\right)^6\)
d)\(\left[\left(-\frac{1}{2}\right)^3-\left(\frac{3}{4}\right)^3\left(-2\right)^2\right]:\left[2\left(-1\right)^5+\left(\frac{3}{4}\right)^2-\frac{3}{8}\right]\)
Tính nhanh :
\(\dfrac{\left(\dfrac{2}{3}\right)^3\cdot\left(-\dfrac{3}{4}\right)^2\cdot\left(-1\right)^5}{\left(\dfrac{2}{5}\right)^2\cdot\left(-\dfrac{5}{12}\right)^3}\)
\(tính\)
\(\left(x^2-x^3\right).\left(x-5\right)\)
\(\left(x+3\right).\left(x^2-3x+9\right)\)
