# 2 Digit Addition with Regrouping Worksheets – 1st Grade Math Unit

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Looking for the BEST 2 digit addition with regrouping worksheets and 1st grade math unit? These 2 digit addition and subtraction activities cover mentally adding and subtracting 10 and sets of 10, using a 100s chart to add 2 digit numbers, using base 10 to add 2 digit numbers, addition with and without regrouping, subtraction without regrouping, and SO MUCH MORE! This 5 week adding and subtracting up to 100 unit is filled with no prep worksheets, posters, assessments and hands-on activities.

This 2 Digit Addition WITH Regrouping Worksheets AND FULL UNIT Includes:

• 25 Days of 1st Grade Worksheets and Activities for 2 Digit Adding and Subtracting
• 3 2 Digit Addition and Subtraction Quizzes
• Pre/Post Test for 1st Grade Adding and Subtracting up to 100
• 25 Day Teaching Guide for 1st Grade Math Unit
• Addition and Subtraction Strategies Anchor Charts (100s chart, adding with a hundreds chart, subtracting with a hundreds chart, 2 digit addition without regrouping with base ten, 2 digit addition with regrouping with base ten, 2 digit subtraction without regrouping with base ten)
• 45 Page 2 Digit Addition and Subtraction Activities on Easel

• 1.NBT.C.5 Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.
• 1.NBT.C.6 Subtract multiples of 10 in the range 10-90 from multiples of 10 in the range 10-90 (positive or zero differences), using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used.
• 1.NBT.C.4 Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used. Understand that in adding two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten.

These adding and subtracting to 100 activities were designed for 1st grade students. They can be differentiated to be used with both kindergarten and 2nd graders.

• 2 digit addition WITHOUT regrouping
• 2 digit subtraction WITHOUT regrouping
• 2 digit addition WITH regrouping
• 2 digit addition using base ten
• 2 digit subtraction using base ten
• 2 digit addition with a hundreds chart
• 2 digit subtraction with a hundreds chart
• 2 digit addition with the standard algorithm
• 2 digit subtraction with the standard algorithm
• mentally subtracting 10
• mentally adding and subtracting sets of 10

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