Now everybody try to find a good hiding place. This ol' tree is going to be the base. I'm going to close my eyes and hide my face and count to a hundred by fives.
Multiplying by five is a little like counting by five. In fact, if you counted along on your fingers as you counted out loud by fives, your fingers would tell you how many fives, you've got.
Ok, let's count it together, now
Count on your fingers . . .
One finger for each count out loud . . .
Get set, ready? Go!
5, 10, 15, 20 - STOP!
Twenty
You got four fingers, see, that means four times five is 20
Let's try another one
Get set, ready? Go!
5, 10, 15, 20, 25, 30, 35 - STOP!
Thirty-five?
Seven fingers . . . that's right
Seven times five is 35
Okay, let's try a longer one. Now when you run out of fingers, at 50 - you see, because ten times five is 50 - then start over with the same fingers and remember that you owe 10 . . . Get set, ready? Go!
Now you may notice that if you multiply five by an even number, your product will end in zero; and if you multiply five by an odd number, your product will end in five.
Ok, now let's do one more game of counting by fives on our fingers