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# 10 to 30 Two-Digit Addition Flashcards – Stars BW (Horizontal)

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Sixty-three addition flashcards with two-digit numbers 10 to 30.

Cut these flashcards out and stick the answer on the back of the related question.

Laminate them to ensure they last longer.

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#### Common Core State Standards alignment

Grade 1 > Standards for Mathematical Practice > Number & Operations in Base Ten > Use place value understanding and properties of operations to add and subtract > CCSS.MATH.CONTENT.1.NBT.C.4
Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10, 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. Understand that in adding two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten.

Grade 2 > Standards for Mathematical Practice > Number & Operations in Base Ten > Use place value understanding and properties of operations to add and subtract > 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.

Grade 4 > Standards for Mathematical Practice > Operations in Base Ten > Use place value understanding and properties of operations to perform multi-digit arithmetic > CCSS.MATH.CONTENT.4.NBT.B.4
Fluently add and subtract multi-digit whole numbers using the standard algorithm.

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