Răspuns:
(18+2×7):(12:2+8:4)=4
a)(18+2x7):(12:2+8:4)
(18+14):(6+2)
32:8=4
b)24-24:3x(72:9-2x3):4x5
24-24:3x(8-6):4x5
24-8x2:4x5
24-16:4x5
24-4x5
24-20=4
c)36:6+4x2x5-(20-12:3).
36:6+4x2x5-(20-4)
36:6+4x2x5-16
6+8x5-16
6+40-16
46-16=30
d)42:7+(6+6):2-24:(5+3)
42:7+12:2-24:8
6+6-3=9
e)(25+20):5-(19+5):8
45:5-24:8
9-3=6
F)10+(10:10+10)-(10x1+10)
10+(1+10)-(10+10)
10+11-20
21-20=1
