Lesson 3: Place Value to 100

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Added on 5/23/2008 by MathWithLarry Tutorials

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Place value is a confusing concept for many students, and many students don't fully understand what it means for a digit to be in a particular place. We use what is called a base-10 math system. What that means is that we use the digits 0 to 9 to represent quantities from zero to nine. Once we get to ten, we need to use two digits to represent numbers, since we only have symbols for 0 to 9.

To represent the quantity ten, we write "10". What this actually means is that we have one 10, and zero 1s. We can say that the "1" is in the "tens" place, and the "0" is in the "ones" place. This is how our world represents numbers, and this system was probably established because we have 10 fingers.

Take a look at the number 37. Make sure you understand that this is actually three 10s (which is 30), and seven 1s (which is 7), forming the number thirty-seven (30+7). We add the values of each place (each column) to determine the number that is represented.

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