Use DPP item I to develop
strategies for the facts in Group F.
Have connecting cubes readily
available. Students can work with a
partner. One student uses
connecting cubes to represent one
side of the equation and the other
represents the other. They then use
those models to find the missing
addend.
8 + 4 + 2 = 10 + 4
9 + 3 + 3 = 15
9 + 7 = 3 + 7 + 6
4 + 4 + 6 = 14
5 + 5 + 5 = 10 + 5
5 + 5 + 8 = 9 + 9
Possible response: I saw both
sides of the equal sign have a
4 and I know 10 + 4 = 14. I
also know 8 is the partner
with 2 to make a ten, so the
answer is 8.
Ongoing Assessment
Use DPP item I to assess students'
abilities to determine the unknown
number in an addition sentence
relating three whole numbers for the
facts in Group F [E15].