What does the red plus mean?

How do you convert billion to mg? How do you use BODMAS? What is 3b? What strategies can be used to divide whole numbers? Is grandmother mention in the king James version bible? What is the range if the numbers are 99 87 85 32 57 82 85 99 85 65 78 87 85 57 85 99? What is the Expanded form for 12.38? The point (2 -5) and has a slope of -7. What is the equation for this line in point-slope form? What is 4 to 23 as a nice fraction? Do you times or add or subtract on 5 yards 4 yards? What is meptin mini 25 mcg? What is a polygon called with 101 sides? Jeff plans to cover the floor of his room 1 foot square tilesif the room is a square that measure 10.5 feet on each side how many tiles will he need? What are all the composite numbers 1 to 50? How do you find the number of sides a regular polygon has if the interior angles equals 144? What is the least common denominator of 11 3 8? What is the abbreviation for the word illustration? In the set of rational numbers the complement of the set of integers is the set of fractions? What is 4 and three fifths minus 3 and four fifths? How many g equal 18 kg?