Question

please solve this question ​

Answer 1

Answer:

it is very easy

1) a=-25

b=30

a+b= -25+30=5

b+a=30-25=5

2)a=2,b=3,c=5

(a+b)+c=2+3+5=10

a+(b+c)=2+3+5=10

3) -2×-3×4= 24

4)a=0,b=8

a×b= 0

b×a=0