Exercice 1et2s'il vous plait!

a)
36x(21+55) = 36x21+36x55
b)
81x(48-7) = 81x48-81x7
c)
(85-7)x71 = 85x71-7x71
d)
(32+91)x44 = 32x44+91x44

2)
a) non lisible
b)
E = 33x(100+3)
E = 33x100+3x33
E = 3300+99
E = 3399

c) non lisible