Question

gent me ajudem,desde ja agradeço​

Answer 1

Resposta:

2)$70-\left\{20-\left[10-\left(4\right)\right]\right\}=56$

3)$45+\left\{15-\left[\left(10-8\right)+\left(7-4\right)-3\right]-4\right\}=54$

Explicação passo-a-passo:

2) $70-\left\{20-\left[10-\left(4\right)\right]\right\} = 20-\left[10-\left(4\right)\right] = 20-6=14\\=70-14= 56$

3) $45+\left\{15-\left[\left(10-8\right)+\left(7-4\right)-3\right]-4\right\}= 15-\left[\left(10-8\right)+\left(7-4\right)-3\right]-4= 15-2-4=9= 45+9= 54$