Abracus needs your help to figure out where the error is in his addition problem!
Lesson 207
Math
1st Grade
Look closely to see if you can find D.C.'s error in his addition.
2nd Grade
Can you find an error in Springling's open number line?
3rd Grade
Join Mrs. Ignagni for a Mystery Math Mistake with her friend Springling. Can you figure out where she went wrong on her open number line?
