CCSS 2.NBT.6 (Common Core, 2nd Grade): "Add up to four two-digit numbers using strategies based on place value and properties of operations." The worksheets below practice this standard. Each one is a free printable PDF with an answer key, comes in multiple versions, and can also be assigned digitally - no login or account needed.
Number and Operations in Base Ten Use place value understanding and properties of operations to add and subtract.6Add up to four two-digit numbers using strategies based on place value and properties of operations.
