Question

10. Considere as seguintes expressões:
D) (15: 5) + 5 = 8
II) (2.1). (0.4) = 8
III) (6.4) - (3.5) = 9
IV) (81: 27) + (8 : 4) = 5​

Answer 1

Resposta:

Explicação passo-a-passo:

$(15:5)+5=8\\3+5=8\\8=8\\8-8=\\0$

$(2.1).(0.4)=8\\2.0=8\\0=8\\0-8=\\-8$

$(6.4)-(3.5)=9\\24-15=9\\9=9\\9-9=\\0$

$(81:27)+(8:4)=5\\3+2=5\\5=5\\5-5=\\0$