Students will decompose 2-digit numbers within 20 using the concept of adding ones to a group of 10. Students will complete an addition number sentence to represent this understanding of numbers 11-20
A. Count to 2-digit numbers within 20 with or without separating a group of ten objects into a ten-frame
B. View an incomplete number line and put missing 2-digit numbers within 20 in the correct spot
C. Use 10-frames and remaining dots to add and solve for 2-digit numbers within 20
D. Count 11 to 19 objects in different arrangements
E. Decompose numbers 11-20 using models involving 10-frames
G. Complete number sentences involving numbers 11-20