Thinking Summary · 1
MasteredVisual Logic: 0 of 1 parts shaded.
[Discovery] Shade 2/5 on a fraction bar — this is one copy.
1
Active StepWelcome to "Probe Slice Scaler", a 4th Grade Multiplyfractions mission at the Explorer (core) level, staged in our space exploration scenario. The mission opens with a hands-on prompt: "Shade 2/5 on a fraction bar — this is one copy." You'll work with the numbers 2, 5, 7 and arrive at a final answer of 5 across 3 guided steps.
Behind the space exploration 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 × 2, bottom: 5.
A general pattern to watch for in 4th Grade multiplyfractions — illustrated with example numbers below, which may differ from this lesson's: 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". If you get stuck on "Probe 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 2/5 on a fraction bar — this is one copy.
1
Active StepEverything you need to know about the Socratic experience.
Shade 2/5 on a fraction bar — this is one copy. Hint: Bar in 5 parts, shade 2.
Is 14/5 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.
Forgetting to simplify or convert to a mixed number. If the result is improper (numerator > denominator), convert: 8/5 = 1 3/5.
Multiplydividefractions (Grade 5 extends this to fraction × fraction.). Open /grade-4/multiplydividefractions to start that topic's missions.
Pure discovery is inefficient — kids hit a wall and quit. Guided Discovery scaffolds the path: a careful sequence of questions, models, and adaptive hints leads the learner toward the insight without revealing it. Inquiry AI's hint system fires automatically after ~15s of hesitation or on the first mistake, escalating from a Socratic nudge to a worked example only when needed. Mistakes are diagnosed via "misconception keys" so the hint matches the actual wrong-thinking pattern.
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.