Count Back
Count back to subtract. Start with 8.
8-3=
5
What is the missing addend?
7+____=13
5
Write 2 addition sentences and 2 subtraction sentences for these numbers
4, 6, 10
4+6=10
6+4=10
10-4=6
10-6=4
Jan had 12 balloons in her hand. 4 balloons flew away. How many balloons does she have now?
12-4=8
Count back to subtract. Start with 12
12-4=
8
What is the missing addend?
12+____=16
4
Write 2 addition sentences and 2 subtraction sentences for this fact family
8, 7, 15
8+7=15
7+8=15
15-8=7
15-7=8
Makenna had 8 toys. She lost 3 of them. How many does she have left?
8-3=5
Count back to subtract. Start with 15
15-5=
10
What is the missing addend?
9+____=15
6
Write 2 addition sentences and 2 subtraction sentences for this fact family
3, 7, 10
7+3=10
10-3=7
10-7=3
Mrs. Stockburger had 15 skittles. She ate 6 of them. How many does she have left?
15-6=9
Count back to subtract. Start with 17
17-4=
13
What is the missing addend?
10+____=16
6
Write 2 addition sentences and 2 subtraction sentences for this fact family
8, 7, 15
8+7=15
7+8=15
15-8=7
15-7=8
Ms. Kalie had 9 stickers. She gave away 8 of them. How many does she have left?
9-8=1
Count back to subtract. Start with 2
2-1=
1
What is the missing addend?
4+____=11
7
18-9=
9
There are 18 first graders in Mrs. Stockburger's class. 3 of them didn't show up to Zoom. How many were in Zoom?
18-3=15