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
Compare each pair of numbers. Write your comparison using $\lt, =,$ or $\gt$ and in words. Explain your answer with a picture.
99 and 100
154 and 231
453 and 428
351 and 354


aligns: no