standard_description: Mentally add 10 or 100 to a given number 100–900, and mentally subtract 10 or 100 from a given number 100–900.
problem_activity: Task
How many ten-dollar bills equal a hundred-dollar bill?
Jem had 20 ten-dollar bills. How many hundred-dollar bills can she trade them for?
Dan had 6 hundred-dollar bills. How many ten-dollar bills can he trade them for?


aligns: no