Column adding

What this chapter teaches

Line up ones under ones and tens under tens, then add from the right. When a column makes 10 or more, write the ones and carry the ten. A common mistake is lining numbers up on the left.

Three questions to ask

There is no one right wording. Listen for the idea.

1. Why do we start adding in the ones column?
2. What do you do when a column adds up to more than 9?
3. Where does the 8 go when you add 126 + 8 in columns, and why?

After the chapter, the learner can

• Line up digits by place value before you add
• Add 3 digit numbers in columns, carrying when you need to