Calcule o valor das expressões:
A) (-5)²-(+10).(-8)=
B) √225:(-1)¹°+(-23)=
C) {[(-40).(-20)]+[(+125):(-5)]}=
D) {(-5-2)²:7¹+[90+√25].(-4)}=
A) (-5)²-(+10).(-8)=
B) √225:(-1)¹°+(-23)=
C) {[(-40).(-20)]+[(+125):(-5)]}=
D) {(-5-2)²:7¹+[90+√25].(-4)}=
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25-(-80)=
25+80=105.
B)15:1-23=
15-23=
-8.
C){[800]+[-25]}=
{800-25}=
775.
D){(-7)<2:7+[90+5].(-4)}=
{14:7+95.(-4)}=
{2+(-380)}=
{2-380}=
-378.