 # Question: What Mean Compatible Numbers?

## How do you teach friendly numbers?

An addition/subtraction strategy that uses a number that is easy to work from, typically 10 or a multiple of 10.

For example, to solve 16 – 9, one might recognize that the friendly number 10 is 6 less than 16, then count down 1 more to 9 to find that the difference is 7.

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## Which number is compatible with 240?

240 is: a semiperfect number. a concatenation of two of its proper divisors. a highly composite number since it has 20 divisors total (1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, and 240), more than any previous number.

## What is a counting number?

Counting Numbers are Whole Numbers, but without the zero. Because you can’t “count” zero. So they are 1, 2, 3, 4, 5, … (and so on).

## What is compatible numbers in division?

Compatible numbers are numbers that are close to the numbers they’re replacing that divide evenly into each other. The quotient is the result you get when you divide. 56,000 is pretty close to 55,304. 800 is pretty close to 875, AND it divides evenly into 56,000.

## What does compatible mean?

capable of existing together in harmony(Entry 1 of 2) 1 : capable of existing together in harmony compatible theories compatible people. 2 : capable of cross-fertilizing freely or uniting vegetatively. 3 : capable of forming a homogeneous mixture that neither separates nor is altered by chemical interaction.

## What are some examples of compatible numbers?

Some examples of compatible numbers when doing addition are 225 and 75, 298 and 2, and 540 and 60. 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.

## How do you explain compatible numbers?

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.

## What is compatible numbers 3rd grade?

In third grade math, teachers mainly emphasize compatible numbers in addition and subtraction. Compatible numbers are numbers that are easy to work with mentally, such as parts of 10. … By third grade, students can also quickly answer 80 + 20 or 100 – 20 by recognizing compatible numbers.

## What is the difference between rounding and compatible numbers?

Round the whole number to the closest compatible number to the denominator. Compatible numbers are numbers that are close in value to the real number that would make it easier to find an estimate calculation. You can round the whole number to a number that is compatible to the denominator of the fraction, 3.