Add 3 numbers (mix of single or two digit numbers)

Adding 3 numbers at a time might look tricky, but you can use the same strategies used for adding 2 numbers to help you.

Have a look at the video below.  Watch how the strategies of using a number line and compensation were applied.

One strategy was not mentioned - bridge to 10.  You can also apply bridge to 10 with 3 numbers.  What do you think that might look like?  

Worked Examples

question 1

question 2

Question 3