Question

calcule o valor das expressões:
a) (7 x 7 + 2) : (17 - 15 :3 +5 ) x 2
b) 20 - (9 x 7 + 5 - 8 x 8) : 4 + (10 : 5 + 9)

Answer 1

a) (49+2): ( 17-5+5)×2
51:17×2
3×2=6

b) 20-(63+5-64):4 + (3+9)
20-(68-64):4+12
20-4:4+12
20-1+12=31