Understand division as an unknown-factor problem. For example, find 32 ÷ 8 by finding the number that makes 32 when multiplied by 8.

*TNCore Focus Standard




This skill emphasizes the importance of knowing that multiplication and division are inverse operations. Such knowledge enhances students’ abilities to solve for the missing whole number in both multiplication and division number sentences. Multiplication fluency is critical.  The importance is that students can use division to solve an unknown in a multiplication problem and vice versa.

Understanding the Standard:

  • Students should have a variety of opportunities to work with number sentences that are missing one of the whole numbers in a division problem.
  • Continued work with multiplication and division fact families will aid students in finding solutions much faster.

Questions to Focus Instruction:

  • Are students able to use a picture or diagram to help them solve for a missing portion of a multiplication or division number sentence?


Prior to: Students are able to fluently multiply and divide. Go to 1.OA.B.4 to see previous skills in this progression.

At Grade Level:
  Students use their knowledge of inverse relationships to solve for the missing whole number in a division problem.