{"system":{"system_id":"uk_england_nc","public_slug":"uk-england-nc","label":"England National Curriculum: Mathematics","official_source_urls":["https://www.gov.uk/government/publications/national-curriculum-in-england-mathematics-programmes-of-study/national-curriculum-in-england-mathematics-programmes-of-study","https://www.gov.uk/national-curriculum"]},"standard":{"system_id":"uk_england_nc","system_slug":"uk-england-nc","system_label":"England National Curriculum: Mathematics","code":"England Y4 Number formal add sub four digits","label":"addition, subtraction, formal methods; calculate, verify.","public_slug":"curratom-england-nc-y4-number-addition-and-subtraction-add-subtract-up-to-four-digits-formal","route":"/math/standards/uk-england-nc/curratom-england-nc-y4-number-addition-and-subtraction-add-subtract-up-to-four-digits-formal","data_json_route":"/math/data/standards/uk-england-nc/curratom-england-nc-y4-number-addition-and-subtraction-add-subtract-up-to-four-digits-formal.json","data_markdown_route":"/math/data/standards/uk-england-nc/curratom-england-nc-y4-number-addition-and-subtraction-add-subtract-up-to-four-digits-formal.md","skill_count":2,"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":[]},{"title":"Place Value Thousands","route":"/math/skills/nbt/place-value-thousands","family_name":"Base-Ten Place Value and Whole-Number Notation","standards":[]}],"crawler_summary":"England Y4 Number formal add sub four digits maps to 2 math skills."}}