Adding and Subtracting Fractions

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Presentation transcript:

Adding and Subtracting Fractions © www.SaveTeachersSundays.com 2013

Adding and subtracting fractions Just like with numbers, we can add and subtract fractions 1 1 2 1 3 2 + + + 2 2 4 4 8 8 2 1 3 1 7 2 - - - 2 2 4 4 8 8 © www.SaveTeachersSundays.com 2013

It is easier to do add fractions if we use diagrams to help us Adding fractions It is easier to do add fractions if we use diagrams to help us 1 1 2 1 3 2 + = + = + = 2 2 4 4 8 8 © www.SaveTeachersSundays.com 2013

Subtracting fractions It is easier to do to subtract fractions we use diagrams to help us 2 1 2 1 7 4 - = - = - = 2 2 4 4 8 8 © www.SaveTeachersSundays.com 2013

To access the remaining 14 slides, covering: unsuitable diagrams for showing fractions more adding and subtracting fractions on diagrams examples: fractions less than a whole, with same denominator fractions more than a whole, with the same denominator fractions with different denominators visit http://www.saveteacherssundays.com/maths/year-3/101/adding-and-subtracting-fractions/ © www.SaveTeachersSundays.com 2013