38) Equation
Bonds of 6, 7, 8, 9: Building
Mathematics
Develop the concept of related addition and subtraction equations, rearranged using the part-part-whole relationship, for two-part bonds of 6, 7, 8 and 9.
Language
- part-part-whole: where the two parts are a bond of the whole number.
- equals, is equal to
- addition, add, plus
- subtraction, subtract, take away
Core Activity Support Materials
Differentiation
A little easier
A little harder
Equations: part-part-whole rearranged
Addition and subtraction equations don’t have to be written as
Part + Part = Whole
Whole – Part = Part
An alternative arrangement is
Whole = Part + Part
Part = Whole – Part
Progression
Apply the concept of building related addition and subtraction equations, using part-part-whole, to find missing parts and missing wholes in addition and subtraction equations. Go to
Activity 39
Bonds of 6, 7, 8, 9: Missing Number Equations, Tic-Tac-Toe