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?
Lesson 201
Math
Kindergarten
Count birds to tell if Dotson made a Mystery Math Mistake when representing the number of birds using a 10-frame [...]
1st Grade
Represent 8 using a number bond and 10-frame to help solve a Mystery Math Mistake. Use Notice and Wonder to [...]
2nd Grade
Warm up with a Mystery Math Mistake to hunt for the mistake in adding two 2-digit numbers using a decomposition [...]