teaching resource

2-Digit Addition - Star Matchup Cards

A set of matchup cards to practice adding a set of 2-digit numbers mentally.

Use this resource when students are learning how to add a set of 2-digit numbers mentally, e.g., 24 + 28.

Print the cards on cardstock and cut them out. Store them in a resealable bag to be used over and over.

Students will match up the number sentence with the correct answer. For students needing extra support, let them use base-10 blocks to determine the answer.

This resource works well when used as a math center activity.

Curriculum

• CCSS.MATH.CONTENT.2.NBT.B.5

Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.

• CCSS.MATH.CONTENT.2.NBT.B.6

Add up to four two-digit numbers using strategies based on place value and properties of operations.

• CCSS.MATH.CONTENT.3.NBT.A.2

Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.