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

Standard 1.NBT.B.2C

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

2 lessons2 worksheets

Lessons for 1.NBT.B.2C

Counting by tens to one hundredSaying ten, twenty, thirty and on, one group of ten at a time.Lesson

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

Printable Worksheets

Counting by tens to one hundred worksheet (PDF)Printable worksheet with answer keyPreview

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