The student will be able to:
: represent word problems involving addition and subtraction of whole numbers up to 20 using concrete and pictorial models and number sentences;
: understand that the equal sign represents a relationship where expressions on each side of the equal sign represent the same value(s);
: determine the unknown whole number in an addition or subtraction equation when the unknown may be any one of the three or four terms in the equation; and
: apply properties of operations to add and subtract two or three numbers.