This worksheet has an illustrated explanation on one side and 40 practice questions on the reverse. The separation and exaggeration of numbers based upon place value helps students see the relationship between place values and begin to add larger numbers with greater accuracy. This worksheet covers place values: ones, tens, and hundreds. (Sample practice question: 5 hundreds 7 tens 34 ones.)
I've had a lot of success using this worksheet to remediate the concept of place value when working with students that haven't quite made the connection using provided curriculum.