{"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":"UK-NC-Y4-equivalence-balance","label":"Use inverse operations and equality relationships to solve missing-number statements.","public_slug":"y4-equivalence-balance","route":"/math/standards/uk-england-nc/y4-equivalence-balance","data_json_route":"/math/data/standards/uk-england-nc/y4-equivalence-balance.json","data_markdown_route":"/math/data/standards/uk-england-nc/y4-equivalence-balance.md","skill_count":1,"skill_ids":["prealg.equation.balance"],"crawler_summary":"UK-NC-Y4-equivalence-balance maps to 1 AXIO Math Map skill."},"skills":[{"id":"prealg.equation.balance","title":"Balancing equations","route":"/math/skills/prealg/equation-balance","family_name":"Equations, Variables, Expressions, and Inequalities"}]}