Addition & Subtraction
3 + 8 = ?
11
If a number is even, it can be placed into two ________ _____________.
equal groups
7 + 3 = ?
Draw an open number line to solve.
10
Check number line for accuracy.
15 - 8 = ?
7
True or False:
An odd number can be placed into two equal groups.
False
15 - 9 = ?
Use an open number line to explain your thinking.
6
Check number line for accuracy.
Samantha has 6 cookies. Her friend gives her 3 more cookies. How many cookies does Samantha have now?
9 cookies
Is the number 7 an even or odd number?
Use pictures or words to explain how you know.
odd
Check explanation for accuracy.
8 + 6 = ?
Use an open number line to solve.
14
Check number line for accuracy.
Mitch had 16 pieces of candy. He gave 5 pieces of candy to his friends. How many pieces of candy does Mitch have left?
11
Billy has 12 cars. Write an equation with two equal addends to show that he has an equal number of cars.
6 + 6 = 12
14 - 7 = ?
Use an open number line to show your work.
7
Check number line for accuracy.
Ethan earned 6 cowboy points last week and 7 cowboy points this week. Ethan says he earned 13 cowboy points 6 + 6 = 12 and 12 + 1 = 13. Is he correct? Explain your thinking using pictures, numbers, or words.
Yes, he is correct.
Check for reasonable explanation.
Is 18 an even or odd number?
Use pictures or words to explain your thinking.
even
Check explanation for accuracy.
Draw a number line and place the following numbers in the correct order:
8, 20, 2, 18, 5
Correct order:
2, 5, 8, 18, 20
Check number line for accuracy.