Adding and Subtracting
Collection Counting
Data and Graphs
Explain Your Thinking
Change Diagrams
100
I have 3 apples. I get 6 more apples. How many apples do I have now?
9 apples
100
Count the objects: ●●●●●
How many are there?
5
100
How many tallies do you see: ||||
4
100
Show or tell how you know 2 + 2 = 4.
Explain the strategy.
100
Draw and describe: I start with 2 cookies. I get 5 more cookies. How many cookies do I have at the end?
7 cookies
200
10 − 4 = ?
6
200
Write the numeral for this many stars: ★★★★★★★
7
200
Which picture shows more:
⬤ ⬤ ⬤
or
⬛ ⬛ ⬛ ⬛ ⬛
Five Squares ⬛ ⬛ ⬛ ⬛ ⬛
200
Explain one way to solve 6 − 2.
Explain the strategy.
200
Fill in the change diagram with this number story: Sam had 4 toys. He got 3 more. How many toys does he have in all?
Start: 4
Change: 3 more
End: 7
300
2 + 5 + 1 = ?
8
300
I count 10 blocks by putting them into two groups. How many can be in each group?
0 and 10
1 and 9
2 and 8
3 and 7
4 and 6
5 and 5
300
The class voted for their favorite pet. Which pet for the most votes?
Birds
300
A student solves 3 + 4 by counting on from 3: "4,5,6,7." Explain why that works. What is the strategy called?
Counting on. It's when you keep a number in your head and keep counting until you've added the second number.
300
Fill in the change diagram with this number story: There were 9 balloons. Some balloons popped. There are 3 balloons left. How many balloons popped?
Start: 9
Change: -6
End: 3
400
There are 9 birds. 3 fly away. How many birds are left?
Extra 100 points: Why do I have to say "birds" after my count?
6 birds
400
Show two ways to make 8 with smaller groups.
_____ + ______ = 8
_____ + ______ = 8
400
A class voted for their favorite pet. How many more kids like cats than fish?
4
400
Describe how you can answer to 5 + 3=8 by using 3+5=8.
I used the Turn Around Rule.
400
Fill in the change diagram with this number story: I had some dolls. I lost 4 dolls. I have 8 dolls left. How many dolls did I start with?
Start: 12
Change: 4 less
End: 8
500
June had 6 stickers. She gave 2 to Ben and 1 to Sam. How many stickers does Maya have now?
3 stickers
500
There are 12 crayons in all. Draw or tell one way to split them so one friend has 7 and another has the rest. How many does the second friend have?
5
500
A class voted for their favorite pet. How many students voted in all?
3+4+2+3+1=13
13 kids voted
500
You solved 9 − 4 = 5 using fingers. Explain step-by-step so another student can copy your method.
I put up 9 fingers. I put down 4. I count 5 left up.
500
How can we use this number model to fill in a change-to-more diagram: 16-9=7
*Hint: A change-to-more diagram shows addition.
*Hint: There are two possible answers.
Start: 7 (or 9)
Change: add 9 (or 7)
End: 16