Suitable for Grades: 2nd Grade, 3rd Grade
CCSS: 2.NBT.B.5, 3.NBT.A.2
CCSS Description: Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.
Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.
students have to calculate the difference between eight number pairs under twenty here. There is a number line provided for support.