The result of the equation - 130 plus 80 plus 20 plus 80, is found as follows;
130 + 80 + 20 + 80
= ( 130 + 80 ) + 20 + 80
= 210 + ( 20 + 80 )
= 210 + 100
= 310
Answer = 310
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The result of the equation - 130 plus 80 plus 60 plus 30, is found as follows;130 + 80 + 60 + 30= ( 130 + 80 ) + 60 + 30= 210 + ( 60 + 30 )= 210 + 90= 300Answer = 300
The result of the equation - 130 plus 80 plus 60 plus 40, is found as follows;130 + 80 + 60 + 40= ( 130 + 80 ) + 60 + 40= 210 + ( 60 + 40 )= 210 + 100= 310Answer = 310
80 + 20 = 100.
150 + 200 + 100 + 130 = 580
To solve this one, subtract 50 from 180 and you'll have your answer.