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### Course: Class 7 (Foundation)>Unit 1

Lesson 2: Estimation problems

# 2-step estimation problem: marbles

Sal solves a 2-step estimation word problem. Created by Sal Khan.

## Want to join the conversation?

• Wait what if its a number like 25 or 75?
• 4 or less, let the 10s place rest. 5 or more, add 1 to the 10s place number.
• why is this video so not easy?
• There are many reasons why videos aren't easy.
1. You might be a type of person who needs more than just some 6-minute video. Maybe search up more videos that talk about 2- step estimation problems. That might make it easier due to the fact that there is a longer explanation about that certain topic.

2. You just don't get it. If that is the case, try watching the video again and see what confuses you. If that doesn't work, ask an adult.

3. You don't understand how they are explaining it. If that is the case, then do what I said in #1, search up more things related to it.

4. You probably don't get the basics. Try watching previous videos and then go back to that video. You might have missed something in easier videos and it is coming back to hit you.

By now, you might get the gist of it. I can go on and on. There are many reasons to why you may think that the video isn't easy.
• how are u doing this? and i cant?
• which part of the problem are you having difficulty with?
Okay let us try it here.
The meaning of estimation problems is that you don't want the exact answer here. You are trying to get to the closest of the answer.
A real life scenario will be like:
1. Let's say you have 10 chocolates in front of you. You've to divide this between you and your friend. So you'll easily divide it and give you and your friend 5 chocolates each.
2. Now let's say you've more than 100 chocolates in front of you. And you don't have time to count to each of them. So from your intuitive sense, you'll just make a partition between them, and try to give both of you the same number of chocolates.
You or your friend may get one or two more(51 or 52 instead of 50). But what you did here was just an estimation.
Hope this helps :)
• is there a simpler way to do this?
• Can we make estimations in all of the questions asked in math or just when required?
• my teacher recommends that we estimate and calculate so that we can see if our answer's reasonable.
• Why did they not make this easy...I am very confused...How do u do this?I really need help...someone help me.pls?
• what is the point of estimating