2.NBT.5
Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction..
Khan Academy ResourcesAdd and subtract on the number line word problemsSubtraction word problems within 1002-step subtraction word problems within 100Find the missing number (add and subtract within 100)Estimate to add multi-digit whole numbers2-step addition word problems within 100Addition word problems within 100Adding and subtracting on number line word problemsSubtraction word problem: basketballAdding and subtracting on number lineAdding two digit numbers on a number lineAddition word problem: horsesMulti-step subtraction word problemMulti step addition word problemSubtraction word problem: crayons

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