If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

## 3rd grade foundations (Eureka Math/EngageNY)

### Course: 3rd grade foundations (Eureka Math/EngageNY) >Unit 2

Lesson 3: Topic C: Foundations

# Subtracting two-digit numbers without regrouping

Sal subtracts 31 from 64 by thinking about tens and ones.

## Want to join the conversation?

• I honestly don't get it. Why use the ''tens'' and the ''ones'' why not just do
95
-45
-------
50
• Do it either way, whatever works best for you. They do it that way to help explain it better, but if you already understand do whatever you want. If you have to do it like that as part of the lesson, it isn't very hard so you should be able to get through it quickly. Nice name, BTW
• I don’t get this. Because there is tens and ones like sal said he subtract 31 from 64 so i need help with this
• 100 thousand divided by 70 thousand=14.28571429
• what do i need to know in 6th grade
• Mama