1.MATH.5.F

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.

Grade 1 · Texas Essential Knowledge and Skills (TEKS) · TEKS 2012

Standard Unwrapping

AI-generated as a starting point — sign in to edit.
Vocabulary
unknown whole numberaddition equationsubtraction equationtermsequation
Skills
  • determine (the unknown whole number in an addition equation) #dok2
  • determine (the unknown whole number in a subtraction equation) #dok2
  • analyze (the position of the unknown in an equation) #dok2
  • solve (equations with unknowns in any position) #dok2
Learning Targets
  • I can identify the term in an equation that is unknown. #dok1
  • I can determine the missing number in an addition equation when the unknown is any term. #dok2
  • I can determine the missing number in a subtraction equation when the unknown is any term. #dok2
  • I can solve equations with the unknown in any position. #dok2
  • I can explain my thinking about how I found the unknown whole number in an equation. #dok3
Big Ideas
  • Understanding equations involves finding out which number is missing, no matter where the blank is.
  • Solving addition or subtraction equations requires flexible thinking about how numbers work together in different positions.
Essential Questions
  • How can we find the missing number in an equation?
  • What clues does an equation give us to help solve for the unknown whole number?
  • Does it matter where the unknown is in the equation? Why or why not?
  • How can you show or explain your thinking when finding an unknown number in an equation?
  • What strategies can you use to check if your answer makes sense?