2.NBT.B.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 ResourcesSubtract within 100 using place value blocksAdd within 100 using place value blocksSubtracting 1s or 10s (no regrouping)Add and subtract on the number line word problemsAdd within 100 using a number lineAdd 2-digit numbers by making tens 2Subtraction word problems within 1002-step subtraction word problems within 100Find the missing number (add and subtract within 100)Add 1s or 10s (no regrouping)Add on a number lineSubtract 1 or 102-step addition word problems within 100Select strategies for adding within 100Break apart 2-digit addition problemsSubtract within 100 using a number lineAdd 2-digit numbers by making tensRegroup when adding 1-digit numbersAddition word problems within 100Adding by making a group of 10Adding and subtracting on number line word problemsAddition and subtraction with number linesAdding 2-digit numbers without regroupingSubtraction word problem: basketballSubtracting 1s using place valueAdding two digit numbers on a number lineSubtracting a 1-digit number with regroupingAddition word problem: horsesSubtracting 10s using place valueMulti-step subtraction word problemUnderstanding place value when adding onesStrategies for adding 2-digit numbersSubtracting two-digit numbers without regroupingAdding with regroupingUnderstanding place value when adding tensBreaking apart 2-digit addition problemsAdding 53+17 by making a group of 10Multi step addition word problemSubtraction word problem: crayons

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