Suitable for Grades: 2nd Grade
CCSS: 2.NBT.B.5, 2.NBT.B.8
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.
Mentally add 10 or 100 to a given number 100–900, and mentally subtract 10 or 100 from a given number 100–900.
Here students will practice subtracting 20 from two digit numbers across 50 questions.