a.135
b.78
c.52,75
Explicație pas cu pas:
b.135+3-(90-30):30
135+3-60:30
135+3-2
137-2
135
b.550:10:11×(48:3-24:12)
55:11×(48:3-24:12)
5×(48:3-24:12)
5×16-24:12
80-24:12
80-2
78
c.2×(307-84:(9-5))-3
2×223:(9-5)-3
223:4-3
55,75-3
52,75
sper ca team ajutat