Question

If A = 12.0 cm+- 0.1 cm and B=8.5cm+-0.5cm,find A+B.

Answer 1

hey friend here is your answer:
A= 12.0cm - 0.1 cm
= 11.9
B= 8.5-0.5cm
= 8.0cm
A+B =11.9+ 8
= 19.9 cm is the answer
hope it helps..

Answer 2

A+B= (12.0+8.5) +- (.1+.5) cm
=( 20.5+- .6 )cm


hope the ans helps you...