Thinking Summary · 1
MasteredEquation Logic: .
[Discovery] How many thousandths are in 0.105? (Type a whole number.)
1
Active StepWelcome to "Fuel Decimal Precise", a 5th Grade Decimaladvanced mission at the Challenger (stretch) level, staged in our space exploration scenario. The mission opens with a hands-on prompt: "How many thousandths are in 0.105? (Type a whole number.)" You'll reason about the numbers 0, 105, 150 across 3 guided steps.
Behind the space exploration story, this lesson is really about decimaladvanced aligned to CCSS 5.NBT.A.3. Read, write, and compare decimals to thousandths using base-ten numerals, number names, and expanded form. The key strategy this mission asks you to internalise: 105 vs 150 — bigger number wins.
A general pattern to watch for in 5th Grade decimaladvanced — illustrated with example numbers below, which may differ from this lesson's: Believing trailing zeros change a decimal's value. 0.4 = 0.40 = 0.400. Trailing zeros after the decimal point are place-value padding, not new value. If you get stuck on "Fuel Decimal Precise", 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 5 · Decimaladvanced
Mission Progress
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Thinking Summary · 1
MasteredEquation Logic: .
[Discovery] How many thousandths are in 0.105? (Type a whole number.)
1
Active StepEverything you need to know about the Socratic experience.
How many thousandths are in 0.105? (Type a whole number.) Hint: 0.105 = 105/1000.
Which form correctly writes 0.105 in expanded form? If you get stuck, the adaptive hint is: The first decimal digit is tenths.
Challenger missions push beyond CCSS expectations with edge cases that surface deeper misconceptions. Within 5th Grade Decimaladvanced, expect numbers in the corresponding range.
Thinking 0.65 > 0.7 because 65 > 7. Add trailing zeros to align: 0.65 vs 0.70. Now 70 > 65 in the same unit.
Decimaldivision (Grade 6 dividing by decimals relies on this place-value foundation.). Open /grade-5/decimaldivision 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.