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1.NBT Number & Operations in Base Ten worksheets

Worksheets for 2 Common Core standards in Number & Operations in Base Ten, Grade 1. Each worksheet has three levels and an answer key.

Make a mixed 1.NBT worksheet
1.NBT.B.31.NBT.C.4
Comparing two-digit numbers1.NBT.B.3Compare two-digit numbers with <, > and = using tens and ones.Adding & subtracting tens and ones1.NBT.C.4Add a one-digit number or a multiple of ten to a two-digit number, and subtract multiples of ten.