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### 8 Cards in this Set

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• Back
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 How do we add or subtract fractions that have the same denominator? We add or subtract the numerators. The resulting sum or difference is written over the denominator 1.A How do we add or subtract fractions that have different denominator? If the denominators are different, it is necessary to rewrite the fractions using unit multipliers so they have the same denominator. 1.A What is a mixed number? A mixed number is the sum of a whole number and a fraction. ie. 13¾ = 13 + ¾, not 13 x ¾ 1.A How do we add and subtract mixed numbers? We add the whole numbers and the fractions separately, then add the differences back together. Sometimes in subtraction we must borrow a whole number to complete the subtraction of the fractions. 1.A Why is it impossible to draw a mathematical line? It is impossible to draw a mathematical line because a mathematical line is a straight line that has no width and no ends. 1.B How do we show the location of a mathematical line? To show the location of a mathematical line, we draw a pencil line and put arrowheads on both ends to emphasize that the mathematical line goes on and on in both directions. We name a line by naming two points on the line. 1.B What is a line segment? A line segment is a part of a line. It contains the endpoints and all points between the endpoints. 1.B How do we show the location of a line segment? To show the location of a line segment, we use a pencil line with no arrowheads. We name a segment by naming the endpoints of the segment. 1.B