Question

1. For any three rational numbers a,b, and c, a+(b+c)=_______
a. (a+b)+c
b. (a+b)-c
c. (a-b )+c
d.(a-b)-c

pl answer this question.....​

Answer 1

Answer:

a=50

b=35

c=40

solution

a. (50+35)+40

(85)+40

85+40=125

b.（50+35）-40

85-40=45

c.（50-35）+40

25+40=65

d.（50-35）-40

25-40=-65

Answer 2

$a + b + c = (a + b) + c$

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