Mathematics (2019) Grade(s): 1
MA19.1.8
Solve for the unknown whole number in various positions in an addition or subtraction equation, relating three whole numbers that would make it true.
Solve for the unknown whole number in various positions in an addition or subtraction equation, relating three whole numbers that would make it true.
COS Examples
Example: determining the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = ? - 3, and 6 + 6 = ?