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Common Core · Grade 2 · Number and Operations in Base Ten

Standard 2.NBT.A.1A

Free lessons and printable worksheets aligned to Common Core math standard 2.NBT.A.1A.

2 lessons2 worksheets

Lessons for 2.NBT.A.1A

Tens and onesA two-digit number is some tens and some ones.Lesson

Base ten blocks and trading ten for oneSwapping ten rods for one flat, or one flat back into ten rods.Lesson

Printable Worksheets

Tens and ones worksheet (PDF)Printable worksheet with answer keyPreview

Base ten blocks and trading ten for one worksheet (PDF)Printable worksheet with answer keyPreview