Teacher Worksheets

Free 1.OA.B.4 Common Core PDF Math Worksheets

Understand a subtraction problem can be solved by thinking of it as the addition of an unknown number to a known number when the sum is known.

First Grade
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Common Core

1.OA.A.1
1.OA.A.2
1.OA.B.3
1.OA.B.4
1.OA.C.5
1.OA.C.6
1.OA.D.7
1.OA.D.8
1.NBT.A.1
1.NBT.B.2
1.NBT.B.2.A
1.NBT.B.2.B
1.NBT.B.2.C
1.NBT.B.3
1.NBT.C.4
1.NBT.C.5
1.NBT.C.6
1.MD.A.1
1.MD.A.2
1.MD.B.3
1.MD.C.4
1.G.A.1
1.G.A.2
1.G.A.3

Language Arts Common Core

L.1.1
L.1.1.A
L.1.1.B
L.1.1.C
L.1.1.D
L.1.1.E
L.1.1.F
L.1.1.G
L.1.1.H
L.1.1.I
L.1.1.J
L.1.2
L.1.2.A
L.1.2.B
L.1.2.C
L.1.2.D
L.1.2.E
L.1.3
L.1.4
L.1.4.A
L.1.4.B
L.1.4.C
L.1.5
L.1.5.A
L.1.5.B
L.1.5.C
L.1.5.D
L.1.6

Free Worksheets

Addition Mixed Math PDF Workbook for First Graders
Addition Workbook (all teacher worksheets - large PDF)
Print This Week's First Grade Math Book (new book each week)
Subtraction Mixed Math PDF Workbook for First Graders
Subtraction Workbook (all teacher worksheets - large PDF)
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Easy addition and subtraction puzzle.
Adding and Counting by Twos
Adding Twos
Adding Three Numbers
Addition Patterns
Easy Addition Sums Puzzle Challenge
Addition Pyramid Puzzle Problem Worksheet
Addition Number Search
Addition Equation Matching Game
Patterns with Shapes
Adding 1 to a 1-digit number
Adding 1 to a 1-digit number - with a fidget spinner
Adding 1 to a 2-digit number
Adding 1 to a 2-digit number - with a fidget spinner
Addition within 10
Addition within 10 - with fidget spinner
Introduction to addition and addition from 0 to 10.
Introduction to adding within ten.
Find Sum
Addition within 10 Missing Number
Addition within 10 Math Fact
Addition within 10 Find Sum
Addition within 10 Missing Number
Addition within 10 Math Fact
Addition Within 10 Mixed Pages
Using Dominoes to Teach Addition Within 10 Worksheet
Using Dominoes to Teach Addition Within 10 Worksheet
Using Dominoes to Teach Addition Within 10 Worksheet
Using Dominoes to Teach Addition Within 10 Worksheet
I have... Who has Addition Game
One digit addition maze.
Addition within 20
Addition within 20 - with fidget spinner
Addition Within 20 and Mixed Place Value.
Introduction to adding within twenty.
Two digit addition maze.
2-Digit addition with no regrouping.
Subtraction within 20 Problems
Free 1.OA.B.4 Common Core PDF Math Worksheets Worksheet #178
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Easy Subtraction Patterns
Missing Number Challenge - Subtract
Subtraction Number Search
Subtraction Equation Matching Game
Introduction to subtraction within ten.
Subtraction within 10 Problems
Subtraction Within 20 and Mixed Place Value.
Introduction to subtraction within twenty.
Two digit subtraction maze.
2-Digit subtraction with no regrouping.
2-Digit Subtraction Matching
Math Minutes
Gifted Kids Math Challenge Workbooks
Mental Math
Math Learning Centers