Welcome to "Flour Sack Stacker", a 2nd Grade Place Value mission at the Explorer (core) level, staged in our bakery scenario. The mission opens with a hands-on prompt: "Build 210 with base-ten blocks: 2 flats, 1 rod, and 0 units." You'll work with the numbers 210, 2, 1 and arrive at a final answer of 10 across 3 guided steps.
Behind the bakery story, this lesson is really about place value aligned to CCSS 2.NBT.A.1. Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones. The key strategy this mission asks you to internalise: Position × digit = value. Hundreds place value = digit × 100.
A general pattern to watch for in 2nd Grade place value — illustrated with example numbers below, which may differ from this lesson's: Treating the zero in the middle (e.g., 506) as "skip it". The 0 is a placeholder that says "no tens here". Without it, 506 collapses to 56. If you get stuck on "Flour Sack Stacker", the adaptive Socratic hints below escalate from a gentle nudge to a worked-out strategy — the same way a one-on-one tutor would coach you through it.
Grade 2 · Placevalue
Mission Progress
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Thinking Summary · 1
Mastered[object Object]
[Discovery] Build 210 with base-ten blocks: 2 flats, 1 rod, and 0 units.
1
Active StepBuild the number 210 using flats, rods, and units.
2nd Grade Place Value explorer-1 representative practice page for students who need a crawlable, worked entry point into the topic without exposing every near-duplicate long-tail mission.
This explorer · core practice mission uses a base-ten model to move from the story to a precise place value idea. Work through the prompts in order: notice the structure first, name the quantities, then check whether the final answer fits the original situation.
In 2nd Grade Place Value, students need to connect the story, the model, and the symbolic answer. The core move here is: Position × digit = value. Hundreds place value = digit × 100. A useful check is to ask whether the answer avoids this pitfall: Confusing digit with its value (saying the 7 in 742 is "7"). Ask: "What is the 7 really worth?" Answer: 700. Practice with random three-digit numbers daily.
