What is 86.346 plus 54.43 minus 9.5 using the correct number of significant figures?

Answer 1

86.346

+54.43

9.5

_______

150.276

Now after we round the number and write it in significant figures , so it should look like this;

150 why?

because when we need to round a number using the significant figures , we must look for the smallest significant figures which is 9.5 .