Find the number that makes each equation true.

Mai, Diego, and Noah find the value of .

1. Diego says, “I can take away.”
   What does Diego mean?

   

   ​​​​​

2. Mai says, “I can count up.”
   ​What does Mai mean?

   

   ​​​​​​

3. Noah says, “I can use what I know about .”
   What does Noah mean?

Find the value of each difference in the subtraction string.
Explain what you notice.

Set 1:

What do you notice?
Why do you think this happens?

Set 2:

What do you notice?
Why do you think this happens?

Find the value of each difference.

2. 
   

5.