{"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.NBT.B.4","label":"addition, subtraction, standard algorithm; calculate, fluently compute.","public_slug":"curratom-us-ccss-4-nbt-b-4","route":"/math/standards/us-ccss/curratom-us-ccss-4-nbt-b-4","data_json_route":"/math/data/standards/us-ccss/curratom-us-ccss-4-nbt-b-4.json","data_markdown_route":"/math/data/standards/us-ccss/curratom-us-ccss-4-nbt-b-4.md","skill_count":1,"skills":[{"title":"Multi Digit Add Sub Fluent","route":"/math/skills/nbt/multi-digit-add-sub-fluent","family_name":"Whole-Number Operations and Fact Fluency","standards":[]}],"crawler_summary":"CCSS.4.NBT.B.4 maps to 1 math skill."}}