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## 3rd grade

### Course: 3rd grade > Unit 8

Lesson 4: Patterns in arithmetic- Finding patterns in numbers
- Recognizing number patterns
- Math patterns
- Intro to even and odd numbers
- Patterns with multiplying even and odd numbers
- Patterns with even and odd
- Patterns in hundreds chart
- Patterns in hundreds chart
- Patterns in multiplication tables
- Patterns in multiplication tables
- Arithmetic patterns and problem solving: FAQ

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# Arithmetic patterns and problem solving: FAQ

Frequently asked questions about arithmetic patterns and problem solving.

## What's the difference between a one-step and two-step word problem?

In a one-step word problem, we only need to perform one operation (like addition, subtraction, multiplication, or division) to find the answer. In a two-step word problem, we need to perform two operations

## What is a $2$ -step expression?

A $2$ -step expression is a math problem that requires two steps to solve. For example, $3x+2x$ is a $2$ -step expression. To solve it, we first add $3x$ and $2x$ together to get $5x$ , and then we can solve for $x$ .

## How do we use estimation in word problems?

In word problems, we can use estimation to help us check our work. For example, if we're trying to find out how many apples there are in $11$ bags, each with $6$ apples, we can estimate that there are about $60$ apples. If we calculate the exact answer and get $15$ , we know we've made a mistake.

## What are patterns in arithmetic?

Patterns in arithmetic are sequences of numbers that follow a certain rule. For example, the sequence $2,4,6,8,10$ is a pattern in arithmetic because we're adding $2$ to each number to get the next one.

## How do we use the topics from this lesson in the real world?

There are many ways we use arithmetic and problem solving in the real world! For example, we might use estimation to plan a budget, or we might use two-step word problems to figure out how much we need to save to buy something we want.

## Want to join the conversation?

- I'm not good at estimation because i like doing the real answer(9 votes)
- What is a two stepped problem?(4 votes)
- whats 1000+1000=(4 votes)
- bob had 1,000000 apples he gave away 1,000 away how many does he have now(5 votes)
- bro why he got so many apples tho...(1 vote)

- Whats 900000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000+80000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000(3 votes)
- The answer is 8e+232 you're welcome(2 votes)

- When we multiply by any number times an even number what do we get?(3 votes)
- I think that the answer for the question "What is a 2-step expression" is too advanced for a 3rd grade student. 3x + 2x = 5x is not so obvious for that grade. Am I right?(2 votes)
- I believe it is because x signifie one number, the same number, accross 3*x and 2*x. If it would be a different number (x and y for example to signifie 7 and 9 let's say) you wouldn't be able to use the associative property. In the previous lessons, Sal made us do 4*7 as 4*5 + 4*2 to help with calculating seven.

See : Sal uses the distributive property to break up 4x7 into smaller numbers. https://www.khanacademy.org/math/cc-third-grade-math/3rd-basic-multiplication/distributive-property/v/using-the-distributive-property-when-multiplying(1 vote)

- It is not 10001000(2 votes)