550 plus 500 is 1,050. This equation can be calculated mentally, on a calculator or by using a pen and paper.
550 is halfway between 500 and 600
550 + 550 = 1100
DL (500+50 = 550)
500
The answer to this equation is 1100.
add / to the second plus sign (5+5+5=550) 5+545=550
500
540
550 + 244 = 794 + 86 = X X= 880
about 500 - 550
it can't equal 550....i think it equals 15
for 5+5+5=550, you'll have to add one line to the plus so the plus will look like a four. 5+545=550