You need to count all the objects in the picture and specify the result. 

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Do you remember the rules that helped you count items up to 10? You may use them to count up to 20. When counting up to 20, pay attention that first of all, you need to count up to 10. It will be the first ten. Then count the rest of the objects. If you have counted one more set of 10 items, it means there are twenty (two tens) of all these objects. Are there less than ten remaining items? It means that the total number of all objects is greater than ten. For instance, you have a few coins. Count them until you get to 10. Put the counted coins a bit away so as not to calculate them the second time. Write down the number 1. It means that you have counted 1 ten. Count the remaining coins until you count them all. Did it turn out to be 8? Write 8 next to the number 1. You wrote down the number eighteen. And how many coins do you have in the end? Ten and eight more: 10 and 8. This is 18.

You will get the correct result if you count each object no more and not less than once. 

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