Addition and Subtraction

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Presentation transcript:

Addition and Subtraction Fact Families © 2007 M. Tallman

Addend- a number that is added to another. 3 + 4 = 7 addend addend © 2007 M. Tallman

Sum- the answer to an addition problem. 3 + 4 = 7 addend addend sum © 2007 M. Tallman

Sum- the answer to an addition problem. 7 sum

Addend- a number that is added to another. 7 sum 3 4 addend addend © 2007 M. Tallman

Addition and Subtraction Fact Families 6 + 2 = 8 2 + 6 = 8 8 – 2 = 6 8 – 6 = 2 © 2007 M. Tallman

Addition and Subtraction Fact Families 3 + 6 = 9 6 + 3 = 9 9 – 6 = 3 9 – 3 = 6 © 2007 M. Tallman

Addition and Subtraction Fact Families 5 + 2 = 7 2 + 5 = 7 7 – 2 = 5 7 – 5 = 2 © 2007 M. Tallman

Addition and Subtraction Fact Families 9 + 2 = 11 2 + 9 = 11 11 – 2 = 9 11 – 9 = 2 © 2007 M. Tallman

7 + 8 = k k = 15 h + 7 = 15 h = 8 15 – 7 = h h = 8 15 - 8 = s s = 7 Your Turn! Use what you know about fact families to solve for the unknown variable. 7 + 8 = k k = 15 h + 7 = 15 h = 8 15 – 7 = h h = 8 15 - 8 = s s = 7 © 2007 M. Tallman

9 + 3 = y y = 12 x + 9 = 12 x = 3 12 – x = 9 x = 3 12 - 3 = v v = 9 Your Turn! Use what you know about fact families to solve for the unknown variable. 9 + 3 = y y = 12 x + 9 = 12 x = 3 12 – x = 9 x = 3 12 - 3 = v v = 9 © 2007 M. Tallman

8 + 9 = a a = 17 9 + b = 17 b = 8 17 – 8 = c c = 9 a - 9 = 8 a = 17 Your Turn! Use what you know about fact families to solve for the unknown variable. 8 + 9 = a a = 17 9 + b = 17 b = 8 17 – 8 = c c = 9 a - 9 = 8 a = 17 © 2007 M. Tallman

Find the sum or difference, then write the related number sentences. Your Turn! Find the sum or difference, then write the related number sentences. 5 + 7 = 12 7 + 5 = 12 12 – 7 = 5 12 - 5 = 7 © 2007 M. Tallman

Find the sum or difference, then write the related number sentences. Your Turn! Find the sum or difference, then write the related number sentences. 24 - 7 = 17 24 - 17 = 7 17 + 7 = 24 7 + 17 = 24 © 2007 M. Tallman

Find the sum or difference, then write the related number sentences. Your Turn! Find the sum or difference, then write the related number sentences. 36 - 25 = 11 36 - 11 = 25 11 + 25 = 36 25 + 11 = 36 © 2007 M. Tallman

Find the sum or difference, then write the related number sentences. Your Turn! Find the sum or difference, then write the related number sentences. 9 + 9 = 18 18 – 9 = 9 © 2007 M. Tallman

Write the fact family for the set of numbers. Your Turn! Write the fact family for the set of numbers. 4, 5, 9 4 + 5 = 9 5 + 4 = 9 9 - 4 = 5 9 - 5 = 4 © 2007 M. Tallman

Write the fact family for the set of numbers. Your Turn! Write the fact family for the set of numbers. 12, 24, 36 12 + 24 = 36 24 + 12 = 36 36 - 12 = 24 36 - 24 = 12 © 2007 M. Tallman

Write the fact family for the set of numbers. Your Turn! Write the fact family for the set of numbers. 26, 17, 43 26 + 17 = 43 17 + 26 = 43 43 - 17 = 26 43 - 26 = 17 © 2007 M. Tallman

Write the fact family for the set of numbers. Your Turn! Write the fact family for the set of numbers. 16, 8, 8 16 - 8 = 8 8 + 8 = 16 © 2007 M. Tallman