A coach buys 7 packs of tennis balls with 3 balls in each pack and then gives away 5 balls. Which operation plan solves the problem?

Q: What will my child learn in "Choose a model or equation"?

Some problems are best shown with a tape diagram, area model, number line, table, or equation. This 4th Grade Math lesson builds the skill Choose and justify strategies in multi-step problems with a concept card and practice.

Q: What grade level is "Choose a model or equation" for?

"Choose a model or equation" is a 4th Grade Math lesson in the Extension: Problem Solving unit, designed for students around ages 9-10.

Q: How many practice questions are in this lesson?

This lesson includes 60 practice questions with instant feedback. Guests can try a few for free, and signed-in learners get the full adaptive set that adjusts to their level.

Q: How does Sparq help with "Choose a model or equation"?

Sparq is a safe AI tutor that gives kid-friendly hints and explains Choose a model or equation step by step, helping students learn without just giving away the answer.

Q: Do I need an account to practice "Choose a model or equation"?

No account is needed to start — guests can try this 4th Grade Math lesson for free. Signing in saves progress, unlocks more practice questions, and tracks mastery.

Question

A coach buys 7 packs of tennis balls with 3 balls in each pack and then gives away 5 balls. Which operation plan solves the problem?

Accepted Answer

multiply then subtract