Respond to this colleague by revising their problems, making them representative of appropriate use of estimation skills and rounding skills. Use math talk to affirm your revision as representing appropriate uses of estimation and rounding skills. Then, choose either the estimation or rounding problem and extend the problem by asking additional mathematical questions appropriate for a Grade 4 or Grade 5 student: Estimating and rounding are used in everyday life. However, students don't realize or relate the estimating and rounding they do on a daily basis. For example, if they want to purchase an ice cream at school. They understand that is $1.79 with tax so they understand that they will need $2.00 to make the purchase. This is just one of the examples, I use when sharing estimation and rounding with students. When students encounter problems that relate to real world experiences, they often find those mathematical activities interesting and fun (Van de Walle, 2019). Rounding The Coca Cola Museum had 848 visitors on Saturday. On Sunday, they had 789 visitors. About how many visitors visited the museum altogether on Saturday and Sunday? Student: Tommy I will take 848 and round it to 900 and then I will take 789 and round it to 800. So, 900 + 800 = 1700. The answer is about 1700 visitors attended over the weekend. Student: Claire I have a different answer. I took 848 and rounded it to 800 because the 4 in the tens place is less than 5. I took the 789 and rounded