Adjust place values mentally, align columns, estimate and check, then solve missing-number problems.
This pilot aligns only to verified Year 3 records MAT-0062–MAT-0065. It samples mental changes, aligned columns, estimation, inverse checking and missing-number problems; it does not complete the unit, establish fluency or formal-method security over time, provide a lesson sequence or satisfy an assessment.
🎓 You are learning to: Adjust place values mentally, align columns, estimate and check, then solve missing-number problems.
Welcome! Three steps and you are learning:
Choose one from the menu at the top.
Pick the answer you could explain with a picture, a pattern or a number fact.
Before you press check, say your answer out loud — does it make sense? Then check and read the feedback.
Missions in this studio: Adjust 3-digit numbers mentally · Use aligned column methods · Estimate and check with inverses · Solve missing-number problems
💡 Top tip: if you get it wrong, that is useful — find out why before trying again.
Nothing you do here is saved or sent anywhere — experiment freely. Reopen this guide any time with the ? Help button.