3.OA.A.4*

Determine the unknown whole number in a multiplication or division equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 × ? = 48, 5 = _ ÷ 3, 6 × 6 = ?

*TNCore Focus Standard


 

Summary:

As students gain more practice and fluency with multiplication and division problems, they can begin to relate three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations:  8 x ? = 48; 5 = ? ÷ 3; 6 x 6 = ?


Understanding the Standard:

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

Questions to Focus Instruction:

  • Can students fluently multiply and divide one digit numbers?
  • Can students make a set of multiplication and division fact families?
  • Are students able to use a picture or diagram to help them solve for a missing portion of a multiplication or division number sentence?

Skills

Prior to: Students will be familiar with a variety of addition and subtraction number sentences involving a missing whole number and have developed a variety of solution methods.

At Grade Level: Students can multiply and divide with fluency. Additionally, students are able to use this knowledge to solve for a missing whole number in a multiplication or division problem.

Beyond Grade Level: Students relate larger numbers in terms of multiplication and division.