Addition =
5 + 10 =
5 + 10 = 15
12 - 4 =
12 - 4 = 8
26 45
26 < 45
Sarah went to the grocery store. She bought 5 apples and 6 bananas. How many items did she buy altogether?
11 items
5, 10, 15, 20, ______
5, 10, 15, 20, 30
20 + 2 =
20 + 2 = 22
7 - 0 =
7 - 0 = 7
86 15
86 > 15
Joey found 3 rocks in his garden. He then collected 6 stick. How many things were there altogether?
9 things
2, 4, 6, 8, ______
2, 4, 6, 8, 10
6 + 6 =
6 + 6 = 12
8 - 2 =
8 - 2 = 6
256 10
256 > 10
3, 5, ______, 9
3, 5, 7, 9
5 + 4 =
5 + 4 = 9
60 - 30 =
60 - 30 = 30
11 0
11 > 0
10, _____, 30, _____, 50
10, 20, 30, 40, 50
0 + 100 =
0 + 100 = 100
100 - 50 =
100 - 50 =
89 89
89 = 89
10, _____, 30, _____, 50
What are we skip counting by here?
We are skip counting by 10s.