Go Math...Letter Home...Chapter 3

This chapter concentrates on addition strategies. Want to know more about the objectives your child will be focusing on during this chapter? Take a look at the I can statements. I Can:
Understand and apply the Commutative Property of Addition for sums within 20 (13 + 2 = 2 + 13). Realizing that you can turn the addends around helps to learn the basic addition facts.
Use the following strategies to find sums for facts to 20:

•             count on 1, 2, or 3   (7 + 2 = ?, I can count on and say 7,8, 9)
•             doubles     (2 + 2  = 4, 3 + 3 = 6, 4 + 4 = 8, etc)
•             doubles plus 1 and doubles minus 1       (4 + 4 = 8, so 4 + 5 = 9)
•             make ten        (0 + 10 = 10, 1 + 9 = 10, 2 + 8 = 10, etc)

This might help count on. I added counting back, but that will be
focusing that in the next unit. 

This might help doubles plus one and doubles minus one.

• Use doubles to create equivalent but easier sums (When solving 4 + 5 = ? I can think of the doubles 4 + 4 = 8 so 4 + 5 = 9).
• Use a ten frame to add 10 and an addend less than 10 (10 + 4 is a whole tens frame plus four more which is 14)
• Understand and apply the Associative Property of Addition to add 3 addends.  The order in which the operations are performed does not matter, such as (2 + 3) + 4  or 2 + (3 + 4). Students can add 2 and 3 first or 3 and 4 first...whatever is easiest to find the answer to 2 + 3 + 4 = ?
• Understand and apply the Commutative Property of Addition to add three addends. You can add 2 + 1 + 3 or 3 + 2 + 1 and still get the same answer.
• Solve adding to and putting together situations using the strategy draw a picture.

Want to support your child's work at home? Check out the videos that will help to start a discussion about the concepts. You can check in with your child to make sure they understand the vocabulary and strategies. Try the activities above, too.