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Common Core · Grade 1 · Number and Operations in Base Ten

Standard 1.NBT.B.2B

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

3 lessons3 worksheets

Lessons for 1.NBT.B.2B

Teen numbers as ten and some moreThirteen is one ten and three ones, which the English number word hides.Lesson

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

Teen numbers as ten and some more worksheet (PDF)Printable worksheet with answer keyPreview

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