Counting On

Counting On 

mental math 

Standard KY.2.OA.2 : 

"Fluently add and subtract within 20 using mental strategies."

I can statements 

• I can understand adding by counting on from the biggest number. 

• I can explain how I do mental addition to find the answer. 

Count on Definition:

Mental math strategy to add two numbers. We start with the biggest number of the numbers to added and count up to the second.

6 + 5 =?

We start on the biggest number (6) and then we count on  with the smallest number (5 ) 
start on 6 and go up 5....
7...8....9...10...11 
so 6 + 5 = 11 

Let's see that addition problem on a number line 

Let's practice adding on in our heads by counting on from the BIGGEST number.

Poll

3+9

• 11

• 12

• 13

• 10

Multiple Choice

6+2

• 5

• 7

• 8

• 10

Open Ended

Explain how to add 7 + 5 and find the Sum.

Good Job! 

Remember find the biggest number first and then count on by the smallest number. 
This will make it easier to add in your head.