Lesson 13 Multiplication Equations

    • Let’s learn about multiplication equations.

Warm-up Which One Doesn’t Belong: Representations

Which one doesn’t belong?

  1. 3 groups of 5 dots.

Activity 1 Multiplication Equation Match

Find an equation from the list that can represent each situation, diagram, or drawing. Record the equation. Be prepared to explain your reasoning.

  1. Diagram. 2 equal parts, each labeled 10. Total length, 20.

  2. Andre had 5 pairs of socks.

  3. Eight ovals, each containing two dots.

  4. 6 hands were on the table. Each hand had 5 fingers.

  5. 3 dot cubes of 5.
  6. Diagram. A rectangle split into 4 parts, each labeled 5. Total length, 20.
  7. Array. 5 arrays of 10 dots each.
  8. Diagram. A rectangle split into 4 parts, each labeled 2. Total length, 8.

  9. There were 4 boxes of markers. Each box had 10 markers.

Activity 2 Write Multiplication Equations

Write an equation that represents each situation, drawing, or diagram. Be prepared to explain your reasoning.

  1. A package has 6 pairs of socks.

  2. Diagram. A rectangle split into 7 parts, each labeled 2. Total length, 14.

  3. Diego has 7 sections in his notebook. Each section has 10 pages.

  4. 9 groups of 2 dots.
  5. Diagram. A rectangle split into 6 parts, each labeled 10. Total length, 60.

  6. Elena has 4 bags of oranges. Each bag has 5 oranges in it.

  7. 8 groups of 5 dots.

Practice Problem

Problem 1

There are 6 basketball teams in the gym. There are 5 people on each team. How many people are on the basketball teams in the gym?

  1. Write an equation with a symbol for the unknown to represent the situation.

  2. Find the number that makes the equation true. Show your reasoning.