Vocab
When you take one part away from the whole, you...
subtract
9+3=
12
Dotty has 8 red flowers and 2 pink flowers. She gives 5 flowers to her mother. How many flowers does Dotty have left?
5 flowers
5+9=
5 can be split into 1 and 4. Add 1 to 9 to make 10, then add 10+4
Answer: 14
8
Addition and subtract facts that use the same three numbers can be called a ____________ or ___________.
fact family or related facts
9+6=
15
Oscar has 8 leaves. He finds 6 more leaves in the morning, and 2 more leaves after lunch. How many does he have in all?
16 leaves
8+4=
4 can be split into 2 and 2. Add 2 to 8 to make 10, then add 10+2
Answer: 12
8+____=20
12
The numbers you add together in an addition sentence are called ____________.
addends
7+7=
14
Shani is a dog walker. Two of her neighbors each have 4 dogs. Another neighbor has 3 dogs. How many dogs does Shani walk altogether?
11 dogs
7+5=
5 can be split into 2 and 3. Add 3 to 7 to make 10, then add 10+2
Answer: 12
9+___=18
9
You can ___________ to subtract 2 from a number.
count back
15-7=
8
Rod, Ty, and Scarlet throw 15 baseballs in all. If they each throw the same number of baseballs, how many baseballs did Scarlet throw?
5 baseballs
Make a fact family using the numbers 8,6, and 14.
8+6=14
6+8=14
14-6=8
14-8=6
9-___=6
3
You can _________ to add 2 to a number.
count on
13-7=
6
Mrs. Forte puts 9 books back in the classroom library. She finds 3 more books and puts those away in the classroom library. How many books did she put away altogether?
12 books
Make a fact family that includes the number sentence, 9+8=
9+8=17
8+9=17
17-9=8
17-8=9
14