Abracus needs your help to figure out where the error is in his addition problem!
Lesson 201
Math
3rd Grade
Warm up with a Mystery Math Mistake as you add two 2-digit numbers using a decomposition strategy. Find Which One [...]
Kindergarten
Help Dotson count birds and help Mrs. Gray create towers for numbers and put them in order from 1 to 10.
1st Grade
Look closely to see if you can find D.C.'s error in his addition.
