Sally add 9 to 27. explain how she can use the make 10 strategy to solve the problem.

If we add two numbers or more than two numbers then make ten strategy is a   basic strategy to learn addition .

In this strategy we break the smaller number in terms to make the larger number equals to ten or tens .

For example :-  

Now, the given addition problem is

Here we break 9 to make 27 equals to 30 or 3 tens.

We can write,

Such that

hence,