Question

Calculează respectând regulile pe care le introduc parantezele în calculele.

C. 6x9:[6-(13-18:2)]

D. [(9-6)x(8+9]+100:(4+6)

E. 5x[3600:30-81:(54:6)]

F. 128:4+[2x(2222:22-22:22)]

G. 36:9+4×[20+6×(100:4-42:2)]

H. 126-[(63×2:6+109)×(75:25+21:3)]:10

Answer 1

C. 6×9:[6-(13-18:2)]=54:[6-(13-9)]
=54:(6-4)=54:2=27
D. [(9-6)×(8+9)]+100:(4+6)=
=(3×17)+100:10=51+10=61
E.5×[3600:30-81:(54:6)]=
=5×(3600:30-81:9)=5×(120-9)=5×111=555
F.128:4+[2×(2222:22-22:22)]=
=32+[2×(101-1)]=32+(2×100)=32+200=232
G. 36:9+4×[20+6×(100:4-42:2)]=
=4+4×[20+6×(25-21)]=4+4×(20+6×4)=
=4+4×(20+24)=4+4×44=4+176=180
H. 126-[(63×2:6+109)×(75:25+21:3)]:10=
=126-[(126:6+109)×(3+7)]:10
=126-[(21+109)×10]:10
=126-(130×10):10=126-1300:10=126-130=-4