**Hawaii Content and Performance Education Standards**. What Is Addition and Subtraction of Fractions? Addition is combining two or more fractions. The term used for addition is plus. When two or more numbers, or addends, are combined they form a new number called a sum. Subtraction is “taking away” one fraction from another fraction. The term is minus. The number left after subtracting is called a difference. Read More...

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Worksheet/Answer keyAdd/Subtract Fractions

Worksheet/Answer keyAdding and Subtracting Fractions

HI.CC.NF.3. Number and Operations--Fractions

Develop understanding of fractions as numbers.

NF.3.1. Understand a fraction 1/b as the quantity formed by 1 part when a whole is partitioned into b equal parts; understand a fraction a/b as the quantity formed by a parts of size 1/b.

NF.3.3. Explain equivalence of fractions in special cases, and compare fractions by reasoning about their size.

NF.3.3(c) Express whole numbers as fractions, and recognize fractions that are equivalent to whole numbers. Examples: Express 3 in the form 3 = 3/1; recognize that 6/1 = 6; locate 4/4 and 1 at the same point of a number line diagram.

HI.CC.G.3. Geometry

Reason with shapes and their attributes.

G.3.2. Partition shapes into parts with equal areas. Express the area of each part as a unit fraction of the whole. For example, partition a shape into 4 parts with equal area, and describe the area of each part as 1/4 of the area of the shape.