Question

RESOLVA AS EXPRESSÕES NUMÉRICAS:

A) 5°+(0,25)-2-(0,5)-2-24=

B) (2-1-1)-1+(-2)3=

Answer 1

Dada a propriedade:

$a^0=1$

= = = = =

a) 
$\mathsf{=5^0+\left(0,25\right)-2-\left(0,5\right)-2-24}\\\\\mathsf{=5^0+0,25-2-0,5-26}\\\\\mathsf{=1+0,25-2-0,5-26}\\\\\mathsf{=0,25-0,5-26+1-2}\\\\\mathsf{=0,25-0,5-27}\\\\\mathsf{=-0,25-27}\\\\\mathsf{=\boxed{\mathsf{-27,25}}}\: \: \checkmark$

= = = = =

b)
$\mathsf{=\left(2-1-1\right)-1+\left(-2\right)3}\\\\\mathsf{=\left(2-1-1\right)-1+\left[3\cdot \left(-2\right)\right]}\\\\\mathsf{=\left(2-2\right)-1+\left[3\cdot \left(-2\right)\right]}\\\\\mathsf{=0-1+\left[3\cdot \left(-2\right)\right]}\\\\\mathsf{=-1+\left(-6\right)}\\\\\mathsf{=-1-6}\\\\\mathsf{=\boxed{\mathsf{-7}}}\: \: \checkmark$