Question

thực hiện phép tính

a:125-(-75)+32-(48+32)

b:3.(-4)có mũ là 2 +2.(-5)-20

c:[-1685]+(-2365)+[+569]-1685

giúp mình vs

Answer 1

a) \(125-\left(-75\right)+32-\left(48+32\right)\)

\(=125+75+32-48-32\)

​\(=200+\left(32-32\right)-48\)​

\(=200+0-48\)

\(=200-48\)

\(=152\)

Answer 2

b) \(3.\left(-4\right)^2+2.\left(-5\right)-20\)

\(=3.16-10-20\)

\(=48-30\)

\(=18\)

c) \(-1685+\left(-2365\right)+569-1685\)

\(=\left(-1685-1685\right)-2365+569\)

\(=-3370-2365+569\)

\(=-5735+569\)

\(=-5166\)