Students will fill in the missing number in a number sentence decomposing numbers 11-19. Students will begin to recognize that these numbers are generated by adding a group of 10 to a 1-digit number
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
F. Decompose numbers 11-20 without using models