2.NBT.B.5
MATH.CONTENT-Number & Operations in Base Ten-Grade 2
Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.
MATH.CONTENT-Number & Operations in Base Ten-Grade 2
Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.