Question

Qual o valor das expressões?
57+4.(28-23)-4=

104-7.(12-8)+15=

87-24.(9-6)+20=

10+3.(34-30)+1=
​

Answer 1

a) 57+4.(28-23)-4
57+4.5-4
57+20-4
77-4
73

b) 104-7.(12-8)+15
104-7.4+15
104-28+15
76+15
91

c) 87-24.(9-6)+20
87-24.3+20
87-72+20
15+20
35

d) 10+3.(34-30)+1
10+3.4+1
10+12+1
23