Adding and Subtracting Fluently
Equal Groups
Addition Strategies
More Addition Strategies
100
Does 9 make this equation true?
8 + __ = 16
No.
8 + 8 = 16
100
Mrs. Hueston has some pieces of candy. Does she have an even number of pieces? How many pieces of candy does Mrs. Hueston have?
No, Mrs. Hueston has an odd number of candies. She has 7 pieces.
100
How can I break apart the second addend to find the sum of 53 + 28?
A. Start at 28. Add 20. Then add 8.
B. Start at 53. Add 20. Then add 8.
C. Start at 28. Add 5. Then add 3.
D. Start at 53. Add 2. Then add 8.
B. Start at 53. Add 20. Then add 8.
100
Which equation do you need to regroup in order to solve?
A. 13 + 16 = __
B. 80 + 15 = __
C. 25 + 21 = __
D. 38 + 29 = __
D. 38 + 29 = __
200
How do you count on to find the sum?
5 + 4 = __
5...6, 7, 8, 9
or
4...5, 6, 7, 8, 9
200
Ms. Thiele has 3 rows of plants in her garden. Each row has 4 plants. Which array matches Ms. Thiele's garden?
200
Which equation does this number line show?
57 + 38 = 95
200
Which equation is equal to 38 + 17?
A. 30 + 10 + 8 + 7
B. 40 + 10
C. 38 + 30 + 8
D. 30 + 8 + 7
A. 30 + 10 + 8 + 7
300
Does 9 make this equation true?
20 - __ = 11
Yes.
20 - 9 = 11
300
Is the sum an even number?
7 + 5 = 12
Yes. 12 is an even number because 6 + 6 = 12.
300
Which equation has a sum of 60?
A. 35 + 35 = __
B. 45 + 25 = __
C. 50 + 20 = __
D. 45 + 15 = __
D. 45 + 15 = __
300
Mrs. Hueston had 65 balloons. Then, she found another 32 balloons. Mrs. Hueston wants to know how many balloons she has now. What equation would help her figure it out?
65 + 32 = __
400
How can you count on to find the sum of 8 + 3?
A. 3 + 8
B. 10 + 1
C. 3...4, 5, 6, 7, 8, 9, 10, 11
D. 8...9, 10
C. 3...4, 5, 6, 7, 8, 9, 10, 11
400
Which equation has a sum that is an even number greater than 10?
A. 5 + 3 = 8
B. 5 + 6 = 11
C. 6 + 6 = 12
D. 5 + 5 = 10
C. 6 + 6 = 12
400
Which is equal to 23 + 17?
A. 26 + 20
B. 20 + 10
C. 20 + 20
D. 3 + 7
C. 20 + 20
400
Is this equation equal to 78?
23 + 12 + 43 = ?
Yes, 23 + 12 + 43 = 78.
Add the tens: 20 + 10 + 40 = 70
Add the ones: 3 + 2 + 3 = 8
Add the partial sums: 70 + 8 = 78
500
Which equation is true if 6 is placed in the blank?
A. 13 - __ = 7
B. 5 + __ = 13
C. 6 + __ = 11
D. 20 - __ = 4
A. 13 - __ = 7
500
Mr. Llanes has 15 boxes of colored pencils in his classroom. Which equation shows a way Mr. Llanes could make an array?
A. 10 + 5 = 15
B. 5 + 5 + 5 = 15
C. 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 = 15
D. 3 + 3 + 3 + 3 = 15
B. 5 + 5 + 5 = 15
500
Mr. Davenport has 48 stickers. He buys 15 more stickers. How many stickers does Mr. Davenport have in all?
Mr. Davenport has 63 stickers in all.
500
Ms. Thiele has 23 more books than Mr. Llanes. Mr. Llanes has 45 books. How many books does Ms. Thiele have?
Ms. Thiele has 68 books.