Resposta :
A) -3-7=-9
B)5.2.(-1)=5.(-2)=10
C)2.0.5+3.0.7=1+2.1=3.1
D)4.[tex] 4^{2} [/tex]-4.[tex] 1^{2} [/tex]=64-4=60
B)5.2.(-1)=5.(-2)=10
C)2.0.5+3.0.7=1+2.1=3.1
D)4.[tex] 4^{2} [/tex]-4.[tex] 1^{2} [/tex]=64-4=60