Question

me ajudem a resolver as expressões abaixo

(a). {✓49+[(-5)-(+35)]-(+28)}

(b). {✓64+[(-5)-(-20)+(-70)]}​

Answer 1

(a). {7+[-5-35]-28}

7+[-40]-28

7-40-28

-61

(b). {8+[-5+20-70]}

8+[-55]

8-55

-47

(a). -61

(b). -47