Determine and explain whether equations involving addition and subtraction are true or false.
The equation 27+13=26+14 can be determined to be true because 26 is one less than 27 and 14 is one more than 13.
Instruction focuses on understanding of the equal sign.
Clarification 2: Problem types are limited to an equation with three or four terms. The sum or difference can be on either side of the equal sign.
Clarification 3: Addition and subtraction are limited to sums up to 100 and related differences.
Subject Area: Mathematics (B.E.S.T.)
Strand: Algebraic Reasoning
Date Adopted or Revised: 08/20
Status: State Board Approved