Addition and subtraction reference sheets for students and parents. Common core standard 3.NBT.2 requires that 3rd grade students be able to use a variety of strategies when adding and subtracting numbers within 1,000. These handy reference/study sheets provide clear and concise labeled examples to help your students and their parents understand and remember 10 different strategies:
*Making Friendly Numbers
*Add Up or Count Back (Number Line)
*Adjusting One Number
*Keeping a Constant Difference
This product is also applicable to 2.NBT.7 and 4.NBT.4.