Students review the definition of a tens number. Given several numbers, students identify the tens. Students are introduced to place value charts by labeling the places in a 2-digit number
A. Review adding ones to 2-digit numbers
B. Review adding tens to 2-digit numbers
D. Break down 2-digit numbers into tens and ones
E. Use place value charts with base-10 blocks to add two 2-digit numbers
F. Solve 2-digit addition equations by adding tens and ones separately
G. Mentally solve 2-digit addition problems
H. Use place value charts with base-10 blocks to add 2-digit numbers, including regrouping
I. Review adding 1- and 2-digit numbers