Mr Fredstrom

1OA1 Common Core practice for word problems with missing addends. Students can draw out known information and solve for the sum/difference or unknown. Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

Students add (sums below 12) using a number line. This adds another modality of understanding addition. Students can start with the higher number and count on by using the visual number line. Common Core understanding requires students to draw, build, explain, etc., and emphasizes the importance of using a number line repeatedly. Students can make up their own number sentences as well. This assignment will lead nicely into using different adding strategies (decomposing numbers etc.) and with d

2OA4 Common Core Practice- Students use this medium to write addition sentences for various arrays. They can make up their own as well.

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.