Adding pairs of 2 two digit numbers is the goal of this activity. However, the numbers will be separated into tens and ones for you to add separately before you compute the final sum
A. Solve equations by adding or subtracting 10 to or from a round number
B. Add and subtract round numbers with and without a model of base-10 blocks
C. Record and solve equations that add a round number to a 2-digit number based on a model of base-10 blocks
D. Record and solve equations that subtract a round number from a 2-digit number based on a model of base-10 blocks
E. Model and solve equations that add a round number to a 2-digit number using base-10 blocks
F. Model and solve equations that add two 2-digit numbers using base-10 blocks
G. Model and solve equations that add two 2-digit numbers using base-10 blocks
H. Model and solve equations that add two 2-digit numbers using base-10 blocks
I. Add across 10 using a ten-frame (within 100)
J. Model and solve 2-digit addition equations with and without exchanging using base-10 blocks
K. Model and solve 2-digit addition equations with and without exchanging using base-10 blocks