Standard
CCSS.Math.Content.1.OA.B.4 - Objective
Understand subtraction as an unknown-addend problem. For example, subtract 10 - 8 by finding the number that makes 10 when added to 8.
1st Grade · Common Core State Standards · Common Core 2010
Understand subtraction as an unknown-addend problem. For example, subtract 10 - 8 by finding the number that makes 10 when added to 8.
1st Grade · Common Core State Standards · Common Core 2010