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Course: MAP Recommended Practice>Unit 14

Lesson 27: Estimation word problems

2-step estimation word problems

Sal solves a 2-step estimation word problem with whole numbers.

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• I didn't understood :( Why should we change the amount?
• because, the question asked to estimate. So sal rounded to the nearest tens place
• Total tires needed: 28 cars * 4 tires/car = 112 tires

Subtract the tires he already has: 112 needed tires - 22 existing tires = 90 tires to buy

So, the race car driver needs to buy approximately 90 tires.
• No one hundred 💯
• It’d two different answer how does this make sense
• What does estimate mean?
• To estimate means to make a good guess. It's like when you look at a jar of jellybeans and try to guess how many are inside. You don't count each one, but you make a good guess based on what you see. In math, we often estimate to make numbers easier to work with. For example, if a number is 28, we might estimate it to 30 because it's a "friendlier" number.
• When is it more useful to use estimation in real life?
• Can someone give me an example of PEMDAS ? Because I don't know it.╮(╯_╰)╭
• Good question🧐. PEMDAS stands for P- Parentheses, E- Exponents, M- Multiplication, D- Division, A- Addition, and S- Subtraction. If you see any question, solve the parentheses first, after that exponents and.... . There are other way to say it like BEDMAS (Depends where you are).
for example, 24÷6-3+(12-6)
1. (12-6)=6
2. 24÷6=4
3. 4-3=1
4. 1+6=7
Hope this helps!!Good luck!!^-^
• the answer is 112 right