Addition
3 tens + 4 tens=
7 tens
9 tens-2 tens=
7 tens
19+9
28
Ben has 40 stickers. He gives 30 stickers to his friends. How many does he have left?
10
Find the missing numbers
10+__=30
30-10=
20
5 tens + 4 tens=
50+40=
9 tens, 90
80-50=
30
36+8=
44
There were 21 dogs at the dog park. 8 more dogs came to the park. How many dogs in all?
29
What is the related addition fact for
70-30=
30+40=70
40+30=70
Show your work
63+5
68
90-80=
10
45+35
80
I had 43 baseball cards. I went to the store and got 25 more baseball cards. How many do I have in all?
68
What is the related subtraction sentence
40+10=50
50-10=40
50-40=10
Show the models and solve
50+14=
20+3=
64, 23
55-22
33
18+76
94
There are 30 students in Ms. Davis's Class. 10 of them are girls. How many of the students are boys?
20
Use related facts
40+__=90
90-40=
50
Solve
53+20=
14+3=
51+7=
20+76=
73,17,58,96
68-45
23
47+55
102
There were 60 students at the carnival. 20 students went home. Then 10 more students went home. How many students are left?
30
Use related facts. Write the related addition sentence
80-__=0
80+0=80