Close Enough Counts: Estimating with Rounding and Friendly Numbers
In this lesson, students will become smart guessers — in a good way! 🤓 Instead of solving every math problem exactly, they'll learn how to estimate solutions by rounding and using numbers that are easy to work with (like 100s and 10s). Whether you're adding up snack prices or guessing how far you’ve walked, estimation helps us save time and check if our answers are reasonable. It’s like using math shortcuts — quick, smart, and super useful! TEKS: 3.2E Estimating and Rounding and adding numbers to the nearest 10 or 100 with friendly numbers MCCRS: Maryland MCCRS (2025) Grade 3 — 3.NBT.A.1: Use place value understanding to round whole numbers to the nearest 10 or 100. MCCRS: Maryland MCCRS (2025) Grade 4 — 4.NBT.B.4: Fluently add and subtract multi-digit whole numbers using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.
