Mr Fredstrom

2OA2 Common Core Adding Using Expanded form, Base 10 blocks, and Number Lines. Use this medium to help show students three different methods for adding double digit numbers with regrouping.

Use this Common Core resource to help students understand addition properties, equalities, and missing addends. Students should draw dots or shapes under each number and visually be able to see how 3+2=4+1 etc. Sheets 1 and 2 have one sum (left or right of the equal sign) and sheets 3 and 4 have 2 and 3 addends on each side of the equal sign. Use whole class, in a guided math group or for a math center.

Common Core Support for 1OA7-This medium provides practice for students to model equalities/inequalities.