Question

adiçao algebrica 0,9ab+2,5ab-5,2ab=

Answer 1

0,9ab+2,5ab-5,2ab=
(09+2,5-5,2)ab=
(3,4-5,2)= -1,8ab

Answer 2

0,9ab+ 2,5ab - 5,2ab = 3,4ab - 5,2ab = - 5,2 ab + 3,4ab = - 1,8 ab