RESOLVA AS EXPRESSÕES NUMÉRICAS:
A) 5°+(0,25)-2-(0,5)-2-24=
B) (2-1-1)-1+(-2)3=
Soluções para a tarefa
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Dada a propriedade:
= = = = =
a)
= = = = =
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](https://tex.z-dn.net/?f=%5Cmathsf%7B%3D%5Cleft%282-1-1%5Cright%29-1%2B%5Cleft%28-2%5Cright%293%7D%5C%5C%5C%5C%5Cmathsf%7B%3D%5Cleft%282-1-1%5Cright%29-1%2B%5Cleft%5B3%5Ccdot+%5Cleft%28-2%5Cright%29%5Cright%5D%7D%5C%5C%5C%5C%5Cmathsf%7B%3D%5Cleft%282-2%5Cright%29-1%2B%5Cleft%5B3%5Ccdot+%5Cleft%28-2%5Cright%29%5Cright%5D%7D%5C%5C%5C%5C%5Cmathsf%7B%3D0-1%2B%5Cleft%5B3%5Ccdot+%5Cleft%28-2%5Cright%29%5Cright%5D%7D%5C%5C%5C%5C%5Cmathsf%7B%3D-1%2B%5Cleft%28-6%5Cright%29%7D%5C%5C%5C%5C%5Cmathsf%7B%3D-1-6%7D%5C%5C%5C%5C%5Cmathsf%7B%3D%5Cboxed%7B%5Cmathsf%7B-7%7D%7D%7D%5C%3A+%5C%3A+%5Ccheckmark "\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")
= = = = =
a)
= = = = =
b)
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