1º ( ) Parênteses 2º [ ] Colchetes
3º { } Chaves

a) (10 - 4)- (9 - 8)+3=
6 - 1 + 3 =
5 + 3 =
8//
b) 50 -[37 - (15 - 8) ]=
c) 28+[50 - ( 24- 2 )-10]=
d) 20+ [13+ (10 - 6 )+4]=
e) 52 - {12+ [15- (8 - 4 )]}=
f) 25 + { 12 + [ 2 – ( 8 – 6 ) + 2 ]} =
g){ [ ( 18 – 3 ) + ( 7 + 5) – 2 ] + 5 } – 12 =
h) 65 – { 30 – [ 20 – ( 10 – 1 + 6) + 1 ]} =
i)45 + { 15 – [ ( 10 – 8 ) + ( 7 – 4) – 3 ] – 4 } =
j) 40 + { 50 – [35 – ( 25 + 5) – 1 ]} + 7 =
k)38 – { 20 – [ 22 – ( 5 + 3) + ( 7 – 4 +1)]} =

answer rather than having to add and subtract the measurements of the semi-circle, notice that the semicircle to the left of ad is actually identical in area to the blank semicircle-shaped space to the left of bc. so if we transferred the red semicircle into the blank space, we would end up with a square of side length 24 cm. the area of a square is s^2 = 24^2 = 676 cm^2.

u also answered this so i think u would know but i am here to

put in or use mine

the correct answer is the second option

answer are

step-by-step explanation: