2.NBT.B.8
MATH.CONTENT-Number & Operations in Base Ten-Grade 2
Mentally add 10 or 100 to a given number 100-900, and mentally subtract 10 or 100 from a given number 100-900.
MATH.CONTENT-Number & Operations in Base Ten-Grade 2
Mentally add 10 or 100 to a given number 100-900, and mentally subtract 10 or 100 from a given number 100-900.