Question

8- Calcule as porcentagens;
a) 30% de 200=
b)50% de 1000=
c) 45% de 240=
d) 15% de 300=

9 - Resolva as expressões.
a) 9x8+ 9x100=
b) 8x8:2=
c) 123-60+6×6=
d)7x7-50=
e)9x9+60=

me ajudem, preciso urgente.​

Answer 1

8-

a) 60 (200÷10=20 20•3=60)

b) 500 (1000÷2=50)

c) 108 (240÷100=2,4 2,4•45=108)

d) 45 (300÷100=3 3•15=45)

9-

a) 972 (9•8=72 9•100=900 72+900=972)

b) 32 (8•8=64 64÷2=33)

c) 99 (6•6=36 123-60=63 63+36=99)

d) -1 (7•7=49 49-50= -1)

e) 141 (9•9=81 81+60=141)