{"system":{"system_id":"us_ccss","public_slug":"us-ccss","label":"US Common Core Math","official_source_urls":["https://thecorestandards.org/Math/","https://thecorestandards.org/standards-in-your-state/"]},"standard":{"system_id":"us_ccss","system_slug":"us-ccss","system_label":"US Common Core Math","code":"CCSS.4.NF.B.3","label":"fraction addition, fraction subtraction, decomposition; calculate, decompose, explain.","public_slug":"curratom-us-ccss-4-nf-b-3","route":"/math/standards/us-ccss/curratom-us-ccss-4-nf-b-3","data_json_route":"/math/data/standards/us-ccss/curratom-us-ccss-4-nf-b-3.json","data_markdown_route":"/math/data/standards/us-ccss/curratom-us-ccss-4-nf-b-3.md","skill_count":4,"skills":[{"title":"Add Same Denom Mixed","route":"/math/skills/frac/add-same-denom-mixed","family_name":"Fraction Equivalence, Comparison, and Operations","standards":[]},{"title":"Add Same Denom Unit","route":"/math/skills/frac/add-same-denom-unit","family_name":"Fraction Equivalence, Comparison, and Operations","standards":[]},{"title":"Decompose","route":"/math/skills/frac/decompose","family_name":"Fraction Equivalence, Comparison, and Operations","standards":[]},{"title":"Sub Same Denom","route":"/math/skills/frac/sub-same-denom","family_name":"Fraction Equivalence, Comparison, and Operations","standards":[]}],"crawler_summary":"CCSS.4.NF.B.3 maps to 4 math skills."}}