Why do we estimate instead of doing the problem?

Good question. There are loads of reasons! Here are some - 1. Estimating can be much quicker than solving the actual problem. 2. We don't always mind about having exactly the right number, we just need to know it roughly. 3. Sometimes we don't have everything we need to solve the problem 'properly' (e.g. we might not have a ruler to hand)

What must you do if your estimates are incorrect or not even close to your actual answer?

Think about the situation again with a clear mind and you will be able to find your mistake and correct it . Good Luck !!

What does Estimate mean?

When you estimate, you roughly find out a value. It's not an exact answer, but instead a number close to the actual value or a range that has the value in it. You can estimate when you're not sure of the actual answer, like Sal did in the video.

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MAP Recommended Practice

Course: MAP Recommended Practice > Unit 23

Lesson 3: Estimating lengths

Estimating lengths

Name: Estimating lengths
Uploaded: 2015-03-17T19:00:12Z
Description: Sal estimates the length of an object when given the length of another object.

Google Classroom

Sal estimates the length of an object when given the length of another object.

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Charles Z (OG)
Posted 9 years ago. Direct link to Charles Z (OG)'s post “Why do we estimate instea...”
Why do we estimate instead of doing the problem?
Comment on Charles Z (OG)'s post “Why do we estimate instea...”
(25 votes)
- moomoosnake
  Posted 9 years ago. Direct link to moomoosnake's post “Good question. There are ...”
  Good question. There are loads of reasons! Here are some -
  1. Estimating can be much quicker than solving the actual problem.
  2. We don't always mind about having exactly the right number, we just need to know it roughly.
  3. Sometimes we don't have everything we need to solve the problem 'properly' (e.g. we might not have a ruler to hand)
  Comment on moomoosnake's post “Good question. There are ...”
  (50 votes)
Kank
Posted 3 years ago. Direct link to Kank's post “What does Estimate mean?”
What does Estimate mean?
Comment on Kank's post “What does Estimate mean?”
(4 votes)
- Hecretary Bird
  Posted 3 years ago. Direct link to Hecretary Bird's post “When you estimate, you ro...”
  When you estimate, you roughly find out a value. It's not an exact answer, but instead a number close to the actual value or a range that has the value in it. You can estimate when you're not sure of the actual answer, like Sal did in the video.
  Comment on Hecretary Bird's post “When you estimate, you ro...”
  (13 votes)
Varija Mehta
Posted 7 years ago. Direct link to Varija Mehta's post “What must you do if your ...”
What must you do if your estimates are incorrect or not even close to your actual answer?
Comment on Varija Mehta's post “What must you do if your ...”
(8 votes)
- vrushank
  Posted 7 years ago. Direct link to vrushank's post “Think about the situation...”
  Think about the situation again with a clear mind and you will be able to find your mistake and correct it .
  
  Good Luck !!
  Comment on vrushank's post “Think about the situation...”
  (6 votes)
31iamsd
Posted 3 hours ago. Direct link to 31iamsd's post “what time is it”
what time is it
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(1 vote)
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Video transcript

- [Voiceover] Lets get some practice estimating lengths. So they tell us this line is one inch. So that distance right over there is one inch. About how long is a toy car? Well, this is one of those lines that they just did so that's one inch, but let's just see how many of those we need to go the whole length of the car. So if I were to draw another one that's about to that, and I'm estimating, it's not exact, that would be two inches. That's one inch, that's two inches. Then that would be three inches. And then that would be four inches. So it looks like the car is about four inches. Let's do another one of these estimating length problems. So I have a picture of two sunflowers right over here, and they tell us that this first sunflower is 40 centimeters tall. About how long is this second sunflower going to be? Lets think about it. If this entire distance, if this entire height is 40 centimeters. And this sunflower, if you look at its height, I'll draw a dotted line here. It looks like it's about half of the height of the taller sunflower. So what is half of 40 going to be? Well, 40 is four tens. Half of four tens is going to be two tens. So this looks like it's about 20 centimeters, let me write it this way, this looks like it's about 20 centimeters. Another way to think about it is if this whole thing is 40 centimeters then half would be 20, then this would be 10 centimeters. Let me write this, this would be 10 centimeters. This would be 20 centimeters. Then this would be 30 centimeters. Then this would be 40 centimeters. So we already saw that the sunflower is 40 centimeters tall. And then this one would be half of that. It would be 20 centimeters tall.