{"id":"SAs2kq4s","uri":"https://rocdata.global/USA/standardnodes/SAs2kq4s","jurisdiction":"https://rocdata.global/USA","document":"https://rocdata.global/USA/documents/DayhBeyn","parent":"https://rocdata.global/USA/standardnodes/SWeXDmzj","kind":null,"subjects":[],"education_levels":[],"concept_terms":[],"children":[],"sort_order":3.0,"notation":"CCSS.Math.Content.1.NBT.C.6","list_id":"","title":"","description":"Subtract multiples of 10 in the range 10-90 from multiples of 10 in the range 10-90 (positive or zero differences), using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used.","language":null,"concept_keywords":null,"path":null,"canonical_uri":null,"source_uri":null,"source_id":"68","notes":"","date_created":"2020-12-17T17:26:55.174780Z","date_modified":"2020-12-17T17:26:55.174810Z","extra_fields":{},"level":4}