Kristi has 3 apples. She gets 2 more apples from Renata. How many apples does Kristi have now?
3+2=5
She has 5 apples.
A symbol that tell us to subtract is called...
a minus sign
3+____=8
5
Nelson has 9 erasers. He gives Alexis 3 of his erasers. How many erasers does Nelson have left?
9-3=6
He has 6 erasers left.
The symbol that tells us to add is called...
a plus sign
____+6=13
7
There were 5 frogs on a log. Some more jump on the log. Now there are 12 frongs in all. How many more frogs jumped on the log?
5+7=12 or 12-5=7
7 more frogs jumped on the log.
What is 8 + 8?
16
In a word problem, if we read "how many more" we should..
subtract or take away
____+____=17
answers vary
Natali has 6 cats. Her sister gave her more cats. Now she has 10 cats. How many cats did her sister give her?
6+4=10 or 10-6=4
Her sister gives her 4 more cats.
Finish the sentence.
A fact family has 4 equations that uses the same 3 numbers in each equation. These equations are all...
related
15-____=5
10
There are 19 birds on a branch. Some birds flew away. Now, there are 10 birds on the branch. How many birds flew away?
19-9=10 or 19-10=9
9 birds flew away.
What is a difference?
A difference is the answer to a subtraction problem.
What is 17 - 5?
12
____-12=5
17