Math Games and Instructional PowerPoints

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.

Read More About CCSS.Math.Content.1.NBT.C.4

Determine whether a group of objects (up to 20) has an odd or even number of members, e.g., by pairing objects or counting them by 2s; write an equation to express an even number as a sum of two equal addends.

Read More About CCSS.Math.Content.2.OA.C.3

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

Read More About CCSS.Math.Content.2.NBT.B.5

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.

Read More About CCSS.Math.Content.3.NBT.A.2

Use place value understanding to round multi-digit whole numbers to any place.

Read More About CCSS.Math.Content.4.NBT.A.3