19. Form any 3 expressions using "q"
and 7. Do not use more than one
number operations. Every expression
must have "q" in it.
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variable takes on different values, its value is not fixed.
A variable allows us to express relations in any practical situation. It also allow us to express many common rules in both geometry and arithmetic in a general way.
Before moving to exercise 11.2 students will read about the Use of Variables in Common Rules.
Rules from geometry:
perimeter of square rectangle
perimeter of rectangle
Rules from arithmetic: This includes
Commutativity of addition and multiplication of two numbers
Distributivity of numbers
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