Search for Science Fair Projects

1000 Science Fair Projects with Complete Instructions

Place Value

Place value is how a digit's position in a number changes what that digit is worth.

Think of it this way

A kitchen tray has three slots: small on the right, medium in the middle, and large on the left. A block in the small slot is worth one, in the medium slot ten, and in the large slot one hundred. The same block changes value just by moving to a different slot on the tray.

Explaining place value by grade level

Write the number 111. Each 1 sits in a new spot. The first 1 means one hundred. The next 1 means ten. The last 1 means just one. Same digit, but each spot gives it a new value.