Răspuns :
(4+2-1x2)x(4-2)xh=20
(4+2-2)x2xh=20
4x2xh=20
6xh=20
6h=20
h=20÷6
h=3,3(3)
(2*2+2-2/2*2)*(2*2-2/1)*h=8*8/8*10
(4+2-1*2)*(4-2)*h=8*10
(6-2)*2*h=80
4*2*h=80
8*h=80
h=80/8
h=10
(4+2-1*2)*(4-2)*h=8*10
(6-2)*2*h=80
4*2*h=80
8*h=80
h=80/8
h=10