What's the value?
Using a 100s chart
Using an open number line
Math Models
100
How many tens are in 65?
6 tens
100
Which direction do you move to add tens using a 100 chart?
down
100
Solve 30 + 20 using an open number line.
50 (models may vary)
100
Solve 50 + 5 using place-value blocks (sticks and stones).
55 
200
What is the value of 3 tens + 5 tens?
8 tens or 80
200
How would you move to solve 12 + 35?
Start at 12, move down 3 rows and 5 squares to the right. OR Start at 35, move down 1 row and 2 squares to the right.
200
How is an open number line different from a standard number line?
An open number line is a visual model used to represent numbers as distances on an unmarked line. (Answers may vary)
200
Solve 49 + 3 using place-value blocks (sticks and stones). Can you make a ten?
52
300
What is the value of the digit 4 in the number 47?
4 tens or 40
300
Which way to do you move on a 100s chart to subtract ones?
Left or backward
300
*Bonus*
Everyone gets 300 points!
300
Solve 43 + 24 using place-value blocks (sticks and stones)
67
400
What is the value of 9 tens and 3 ones?
93
400
Solve 56 + 40. How many rows will you move down from 56?
96
Move down 4 rows because 4 tens = 40.
400
Solve 98 + 5 using an open number line.
103 (models may vary)
400
Write a number sentence to match:
Then solve.
45 + 24 = 69
500
Show the value of 234 in expanded form.
200 + 30 + 4 = 234
2 hundreds + 3 tens + 4 ones = 234
500
Fill in the missing numbers from least to greatest.
47, 50, 59
500
Solve 29 + 24 using an open number line.
53 (models may vary)
500
Solve 38 + 41 using place-value blocks (sticks and stones).
