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## 2nd grade

### Course: 2nd grade > Unit 2

Lesson 1: Intro to place value- Intro to place value: FAQ
- Intro to place value
- Use place value blocks to show numbers within 1,000
- Place value blocks within 1,000
- Place value tables within 1,000
- Place value tables within 1,000
- Identifying value in digits
- Identify the value of a digit (ones, tens, hundreds)
- Creating the largest number
- Create the largest number

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# Intro to place value: FAQ

Frequently asked questions about the introduction to place value.

## Why do we need to learn about place value?

Place value is a key concept in understanding how numbers work. Without it, we wouldn't be able to tell the difference between, 100 and 10. We also use place value when we're adding, subtracting, multiplying, and dividing numbers, so it's important for all kinds of math!

Understanding place value is important in all kinds of math, from counting money to telling time to measuring things. Being able to compare numbers is also essential in many situations, like when we're trying to figure out which team won a game or who has the highest score.

## What's the difference between standard, word, and expanded form?

Standard form is just the way we usually write numbers, like 567. Word form spells out the number in words, like "five hundred sixty-seven". Expanded form breaks the number down into its component parts, like 500, plus, 60, plus, 7.

## What does "regrouping" mean?

Regrouping is when we exchange ten of one kind of unit for one of the next unit. For example, we can regroup ten ones into one ten, or ten tens into one hundred.

For example, we can regroup start color #7854ab, 50, end color #7854ab, start text, space, t, e, n, s, end text into start color #7854ab, 5, end color #7854ab, start text, space, h, u, n, d, r, e, d, s, end text.

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## What are even and odd numbers?

An start color #0c7f99, start text, e, v, e, n, end text, end color #0c7f99 number is a number that can be split into 2 equal groups.

We find start color #0c7f99, start text, e, v, e, n, end text, end color #0c7f99 numbers by making sure every object in the group has a pair.

Examples of start color #0c7f99, start text, e, v, e, n, end text, end color #0c7f99 numbers are start color #0c7f99, 2, end color #0c7f99, comma, start color #0c7f99, 4, end color #0c7f99, comma, start color #0c7f99, 6, end color #0c7f99, comma, start color #0c7f99, 8, end color #0c7f99, comma, start color #0c7f99, 10, end color #0c7f99, comma, point, point, point

An start color #9e034e, start text, o, d, d, end text, end color #9e034e number

**cannot**be split into 2 equal groups.We find start color #9e034e, start text, o, d, d, end text, end color #9e034e numbers by trying to pair objects and finding there is

**not**always a pair.Examples of start color #9e034e, start text, o, d, d, end text, end color #9e034e numbers are start color #9e034e, 1, end color #9e034e, comma, start color #9e034e, 3, end color #9e034e, comma, start color #9e034e, 5, end color #9e034e, comma, start color #9e034e, 7, end color #9e034e, comma, start color #9e034e, 9, end color #9e034e, comma, point, point, point

## How do we compare two numbers?

We usually start by looking at the leftmost digit. If one number has a larger digit there, it's bigger. If the digits are the same, we move on to the next digit and compare those. If the numbers are the same all the way through, they're equal!

## Want to join the conversation?

- It uncorrect. 1+1=1 because 1 shoe+ 1 shoe=1pair of shoe (:(13 votes)

- what is 50 + 50?(13 votes)
- so what is 100-200(10 votes)
- The answer is -100(12 votes)

- why in the world is math a thing anyways?(10 votes)
- Math is a thing because the universe is written in the language of math. Anything from the shoes on your feet to the computer your using needs math to operate at the fundamental level(8 votes)

- twelve times twelve eqeals hudred a fourty four(3 votes)

- thirteen plus thirteen eqeals twenty six(3 votes)

- How do you subtract numbers by regrouping?(5 votes)
- You regroup first then substract(8 votes)

- who knows what 200x100000(6 votes)
- I now, really easy! it 20000000(5 votes)

- well 1x1=1 and 2x2=4 and 3x3=9 like it's so ez(5 votes)
- the odd numbers are 13579 and the even numbers are 246810

right?(6 votes)- That’s a good answer,good job(3 votes)