Are your students struggling with understanding tha in a multi-digit number, a digit in one place represents 10 times as much as it represents in the place to its right and 1/10 of what it represents in the place to its left? 5.NBT.A.1?
This sheet is an excellent resource for additional practice with the skill. It features a x10 place value chart for easy reference and a "think-aloud" example.
Example problems include:
Write a number that is 10 times larger than 0.08
Write a number that is 1000 times smaller than 30
There is a challenge question at the end.