Question

determine o valor das expressões numéricas

a) 31+(-40):(+2)
b) (-36):(-4)+3. (-3)​

Answer 1

a) 31+(-40):(+2)

$31+\left(-40\right)\div \left(2\right)=11\\\\31+\left(-40\right)\div \left(2\right)\\\\31-20\\\\11$

b) (-36):(-4)+3. (-3)​

$(-36):(-4)+3. (-3)​\\\\\left(-36\right)\div \left(-4\right)+3\left(-3\right)]\\\\\left(-36\right)\div \left(-4\right):9\\\\9+3\left(-3\right)\\\\9-9\\\\0$