This read-aloud will engage students and get them thinking about grouping hundreds, tens, and singles to make numbers. The students in Earth Day Hooray! have the challenge to collect 5,000 aluminum cans. At the end of each day, they have to add to their previous totals. They do this by adding hundreds first, then tens, and then the ones. The teacher will stop the video after each day and ask questions that will make the students mentally add and subtract numbers.
The 10 Less and 10 More document can be used as an assessment, exit pass, or practice sheet for students working on adding/subtracting ten and 100 from any given number between 100 and 900.
In this task, students will be exploring number patterns as they add or subtract ten and as they add or subtract 100. The students will see what happens to the digit values in numbers as they work through this activity.
