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compatible numbers addition

by Dr. Lucio Morar III Published 3 years ago Updated 2 years ago

Examples of compatible numbers in addition include:

  1. and 9
  2. and 8
  3. and 7
  4. and 6
  5. and 5

Compatible numbers are pairs of numbers that are easy to add, subtract, multiply, or divide mentally. When using estimation to approximate a calculation, replace actual numbers with compatible numbers. The numbers 500 and 300 are compatible for addition, since the sum of 800 can be easily calculated mentally.

Full Answer

What are compatible numbers in math?

In mathematics, compatible numbers are the numbers that are easy to add, subtract, multiply, or divide mentally. Compatible numbers are close in value to the actual numbers that make estimating the answer and computing problems easier.

How to estimate compatible numbers?

Knowledge of the compatible numbers that are used for mental calculations is used for estimation. For example: A variation of the compatible number strategy, this method involves taking one or more from one addend and adding it to the other.

What numbers are compatible when doing subtraction?

Some examples of compatible numbers when doing subtraction are 435 and 25, 800 and 600, and 5986 and 2986. When estimating, keep in mind that we are not claiming the answer will be exact. we are just looking for a reasonable estimate.

What is compatible number strategy?

Compatible Number Strategy Compatible numbers are number pairs that go together to make “friendly” numbers. That is, numbers that are easy to work with.

What is compatible numbers 3rd grade?

Compatible numbers are numbers that are easy to work with mentally, such as parts of 10. Students who memorize 8 + 2 = 10 can more easily reason that 10 - 2 = 8. By third grade, students can also quickly answer 80 + 20 or 100 - 20 by recognizing compatible numbers.21-May-2018

What are compatible numbers in math?

In mathematics, compatible numbers are the numbers that are easy to add, subtract, multiply, or divide mentally. Compatible numbers are close in value to the actual numbers that make estimating the answer and computing problems easier.

How do you solve using compatible numbers?

0:245:09Compatible Numbers in Division - YouTubeYouTubeStart of suggested clipEnd of suggested clipAll right so you're using compatible nuts running finding a quotient using credible numbers theMoreAll right so you're using compatible nuts running finding a quotient using credible numbers the first you should do is say it in your head. And then round to it's compatible numbers.

What is an example of a compatible number?

Compatible numbers are pairs of numbers that are easy to add, subtract, multiply, or divide mentally. When using estimation to approximate a calculation, replace actual numbers with compatible numbers. The numbers 500 and 300 are compatible for addition, since the sum of 800 can be easily calculated mentally.

What is the compatible numbers for 99999 and why?

compatible number for 99999 =10000 Compatible numbers are only used in mental computation. Working with decimals can make it difficult to multiply and divide, so compatible numbers help to simplify the tasks.13-Jun-2017

How do you round using compatible numbers?

4:005:003rd Grade Math Rounding and Compatible Numbers - YouTubeYouTubeStart of suggested clipEnd of suggested clipThink of numbers that end with 25 50 or 75 think of using those in quarters 125 will be fiveMoreThink of numbers that end with 25 50 or 75 think of using those in quarters 125 will be five quarters to be like a dollar 25 cents 75 cents will be like three quarters.

How do you multiply using compatible numbers?

0:062:01How Do I Multiply Using Compatible Numbers? - YouTubeYouTubeStart of suggested clipEnd of suggested clipNow a trick for a little bit harder multiplication. The most compatible numbers are 2 and 10 soMoreNow a trick for a little bit harder multiplication. The most compatible numbers are 2 and 10 so whenever you have to multiply by 5 I want you to think 2 and 10. So if we say 60 6.

How do you find compatible numbers to estimate quotients?

0:0713:124th Grade Math 4.5, Estimate Quotients Using Compatible NumbersYouTubeStart of suggested clipEnd of suggested clipWe can also use compatible numbers to find two estimates that the quotient is between 22 divided byMoreWe can also use compatible numbers to find two estimates that the quotient is between 22 divided by 5 is between 20 divided by 5 equals 4 and 25 divided by 5 equals 5.

How do you round using compatible numbers?

Rounding with the purpose of estimating the value of calculations is the best use of compatible numbers. To do this, round each number in the prob...

What are some examples of compatible numbers?

Compatible numbers, numbers that are easy to work with mentally, differ depending on the operation. Addition: Numbers that end in zeros, or add to...

What is the difference between rounding numbers and compatible numbers?

Rounding is a process used to find compatible numbers. The rounding itself is not a compatibility construct; only when the number is rounded to a...

What is the compatible number for 99999 and why?

If finding a compatible number to replace 99999 for estimation purposes, 100000 is the closest, easy to work with number. However, if looking for...

What is a compatible number in fractions?

Compatible numbers in fractions, just like compatible numbers in general, are numbers that are easy to work with mentally. Sometimes it is necessa...

What is compatible number?

In mathematics, compatible numbers are the numbers that are easy to add, subtract, multiply, or divide mentally. Compatible numbers are close in value to the actual numbers that make estimating the answer and computing problems easier.

Is it difficult to find the product of 24.3 and 18.7?

It is difficult to find the product of 24.3 and 18.7 mentally and quickly. So, we use compatible numbers and find the product which is closer to the actual answer.

What is compatible number?

What are compatible numbers? Compatible numbers are numbers that look nice or friendly with each other when we do mental calculation to estimate a product, an addition, a subtraction, but especially a division.

What are compatible numbers in a multiplication table?

Some examples of compatible numbers when doing division are 400 and 10, 36 and 6, 2400 and 12, and 64 and 8.

How to get 120000?

Multiply 3 by 4 and add four zeros at the end to get 120000.

How to divide 24 by 12?

24 can be divided by 12 to get 2. Then, add a zero at the end to get 20

When estimating with division, should you decrease the value of one number?

When estimating with division, if you decrease the value of one number, you should also decrease the value of the other. If you increase the value of one number, you should increase the value of the other.

Is 2400 and 12 compatible?

2400 and 12 are compatible because when doing this division (2400/12), we can quickly divide 24 by 12 to get 2 and put two zeros at the end to get 200. Some examples of compatible numbers when doing multiplication are 200 and 40, 1100 and 40, 25 and 4.

What are Compatible Numbers?

Mathematical operations are easy to calculate with a calculator. As long as a person understands the process for calculation and has a calculator, any numbers can be manipulated through any amount of mathematical operations with ease using a calculator.

Reasons to Use Compatible Numbers

Many calculations are difficult to conduct mentally, however, it is good to be able to do mental calculations.

Compatible Numbers: Examples

Compatible numbers differ by mathematical operation. There are sets of compatible numbers for each operation and major mathematical calculation like fractions and estimating.

When do we use compatible numbers?

We use compatible numbers to make the problem easier to solve in our head by rounding each number to the nearest ten, twenty, fifty or hundred.

How much is 2 onions?

2 onions: It is $0.40 for an onion, so $0.80 for two. But you're adding up a bunch of things in your head in the store, so it's easier to use the compatible number of $1.00 for two onions. So far, we have spent about $7 on tomatoes and onions and have $13 more to spend on the other ingredients.

What is compatible number?

Compatible numbers are number pairs that go together to make “friendly” numbers. That is, numbers that are easy to work with. For example:

How many pairs of numbers are there in a math class?

In the early grades, students learn the number of pairs that total ten – 1 and 9, 2 and 8, 3 and 7, and so on. These can be extended to such combinations as 10 and 90, 300 and 700, etc.

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