Our new topic (Topic 5) is Addition to 20
During this topic, we will be teaching children strategies to help them become quicker with their math facts. BUT…the idea of addition is adding 2 parts together to determine the whole. They can always use manipulatives, draw a picture, use their fingers, or count on to figure out an answer to an addition problem!!!!
The first strategy is doubles facts. We learned a rap to help us memorize the doubles facts.
It’s the doubles baby, let’s go, let’s go
It’s the doubles baby and we’ll start with 0
0+0=0 ohhh
1+1=2 OOOOO
2+2=4 More!
3+3=6 Kicks!
4+4=8 That’s great!
5+5=10 Again!
6+6=12 That’s swell
7+7=14 Let’s lean
8+8=16 That’s keen!
9+9=18 Jelly Bean!
10+10=20 That’s plenty!
Then they have a doubles +1 strategy. If the numbers are 1 apart (neighbors on the number line) then you can double the smaller number and add 1. For example, 5+6 can be thought of as 5+(5+1).
Then they have the doubles +2 strategy. If the numbers sit 2 apart on the number line there are two ways to think about it.
You can double the smaller number and add 2
5+7…can be thought as 5+5+2
or
You can use the number that is between them and double that….5+7…can be thought of as 6+6…because if seven gives one to the five…the five becomes 6 and the seven becomes a 6.
AGAIN: These strategies are being introduced to the students. Whichever way they are comfortable solving the problem is OK.
Possible Strategies
Using manipulatives
Drawing a picture
Using their fingers
Count on
doubles
doubles +1
doubles +2
During this topic, we will be teaching children strategies to help them become quicker with their math facts. BUT…the idea of addition is adding 2 parts together to determine the whole. They can always use manipulatives, draw a picture, use their fingers, or count on to figure out an answer to an addition problem!!!!
The first strategy is doubles facts. We learned a rap to help us memorize the doubles facts.
It’s the doubles baby, let’s go, let’s go
It’s the doubles baby and we’ll start with 0
0+0=0 ohhh
1+1=2 OOOOO
2+2=4 More!
3+3=6 Kicks!
4+4=8 That’s great!
5+5=10 Again!
6+6=12 That’s swell
7+7=14 Let’s lean
8+8=16 That’s keen!
9+9=18 Jelly Bean!
10+10=20 That’s plenty!
Then they have a doubles +1 strategy. If the numbers are 1 apart (neighbors on the number line) then you can double the smaller number and add 1. For example, 5+6 can be thought of as 5+(5+1).
Then they have the doubles +2 strategy. If the numbers sit 2 apart on the number line there are two ways to think about it.
You can double the smaller number and add 2
5+7…can be thought as 5+5+2
or
You can use the number that is between them and double that….5+7…can be thought of as 6+6…because if seven gives one to the five…the five becomes 6 and the seven becomes a 6.
AGAIN: These strategies are being introduced to the students. Whichever way they are comfortable solving the problem is OK.
Possible Strategies
Using manipulatives
Drawing a picture
Using their fingers
Count on
doubles
doubles +1
doubles +2