A student solved 49 × 6 by thinking 50 × 6 = 300 and then subtracting 6. Is this strategy valid?

Q: What will my child learn in "Explain and defend reasoning"?

Students explain the method they used, why it fits the problem, and why the answer is reasonable. This 4th Grade Math lesson builds the skill Synthesize grade-level concepts with a concept card and practice.

Q: What grade level is "Explain and defend reasoning" for?

"Explain and defend reasoning" is a 4th Grade Math lesson in the Year-end Synthesis unit, designed for students around ages 9-10.

Q: How many practice questions are in this lesson?

This lesson includes 36 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 "Explain and defend reasoning"?

Sparq is a safe AI tutor that gives kid-friendly hints and explains Explain and defend reasoning step by step, helping students learn without just giving away the answer.

Q: Do I need an account to practice "Explain and defend reasoning"?

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 student solved 49 × 6 by thinking 50 × 6 = 300 and then subtracting 6. Is this strategy valid?

Accepted Answer

yes