Welcome to "Cookie Tray Multiplier", a 4th Grade Multi-Digit Multiplication mission at the Explorer (core) level, staged in our bakery scenario. The mission opens with a hands-on prompt: "Decompose 12 × 13 into place-value parts and fill each cell of the partial-products box." You'll reason about the numbers 12, 13 across 3 guided steps.
Behind the bakery story, this lesson is really about multi-digit multiplication aligned to CCSS 4.NBT.B.5. Multiply a whole number of up to four digits by a one-digit number, and multiply two two-digit numbers, using strategies based on place value. The key strategy this mission asks you to internalise: 12 × 13 = ?
A general pattern to watch for in 4th Grade multi-digit multiplication — illustrated with example numbers below, which may differ from this lesson's: Multiplying only ones × ones and tens × tens (skipping the cross terms). The area model has *four* boxes for a reason. Every digit on top must meet every digit on the bottom. If you get stuck on "Cookie Tray Multiplier", 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 4 · Multidigitmult
Mission Progress
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Thinking Summary · 1
Mastered[object Object]
[Discovery] Decompose 12 × 13 into place-value parts and fill each cell of the partial-products box.
1
Active StepDecompose 12 × 13 into place-value parts. Fill each cell, then sum.
| × 10 | × 2 | |
|---|---|---|
| 10 × | ||
| 3 × |
4th Grade Multi-Digit Multiplication 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 partial-products box to move from the story to a precise multi-digit multiplication 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 4th Grade Multi-Digit Multiplication, students need to connect the story, the model, and the symbolic answer. The core move here is: 12 × 13 = ? A useful check is to ask whether the answer avoids this pitfall: Misaligning partial products before summing. Use graph paper or column lines. Partial products live in different place-value columns and must stack accordingly.
