Thinking Summary · 1
MasteredVisual Logic: 0 of 1 parts shaded.
[Discovery] Shade 3/8 on a fraction bar — this is one copy.
1
Active StepWelcome to "Cupcake Slice Scaler", a 4th Grade Multiplyfractions mission at the Explorer (core) level, staged in our bakery scenario. The mission opens with a hands-on prompt: "Shade 3/8 on a fraction bar — this is one copy." You'll work with the numbers 3, 8, 7 and arrive at a final answer of 8 across 3 guided steps.
Behind the bakery story, this lesson is really about multiplyfractions aligned to CCSS 4.NF.B.4. Multiply a fraction by a whole number, e. The key strategy this mission asks you to internalise: Top: 7 × 3, bottom: 8.
A general pattern to watch for in 4th Grade multiplyfractions — illustrated with example numbers below, which may differ from this lesson's: Multiplying both numerator AND denominator (3 × 1/4 = 3/12). Only the numerator multiplies. The denominator names the slice size — it does not change. If you get stuck on "Cupcake Slice Scaler", 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 · Multiplyfractions
Mission Progress
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Thinking Summary · 1
MasteredVisual Logic: 0 of 1 parts shaded.
[Discovery] Shade 3/8 on a fraction bar — this is one copy.
1
Active StepEverything you need to know about the Socratic experience.
Shade 3/8 on a fraction bar — this is one copy. Hint: Bar in 8 parts, shade 3.
Is 21/8 greater than, less than, or equal to 1? If you get stuck, the adaptive hint is: Numerator > denominator ⇒ improper ⇒ > 1.
Explorer missions hit the core abstraction at typical numeric ranges — this is where conceptual mastery is built. Within 4th Grade Multiplyfractions, expect numbers in the corresponding range.
Treating the whole as a fraction with denominator 1 incorrectly. 3 = 3/1, so 3 × 1/4 = 3/1 × 1/4 = 3/4. The shortcut is "whole times numerator over denominator".
Addfractions (Multiplication by a whole IS repeated addition of a unit fraction.). Open /grade-4/addfractions to start that topic's missions.
Socratic teaching answers a question with a better question. Instead of "the answer is 12", the system asks "if you had 3 groups of 4, how could you skip-count?" The goal is to externalize the learner's reasoning so they hear themselves think. Every Inquiry AI hint follows this pattern: nudge → reframe → analogy → only then a worked example, in that order.
Yes. Every mission, handbook page, and topic hub is mapped to a specific CCSS code (visible in the page header). The curriculum follows the CCSS coherence map: Grade 1 number sense → Grade 3 multiplicative thinking → Grade 6 ratio reasoning, with each grade building strictly on the prior year's foundations.