How To Use Compatible Numbers In Division

You can use compatible numbers to estimate a quotient. Compatible numbersare numbers close to the values of the actual dividend and divisor that allow you to multiply or divide using basic facts.

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500 and 20 are compatible numbers that are close to 504 and 21.

How to use compatible numbers in division. Students will be able to estimate quotients with two digit divisors using compatible numbers. Compatible numbers for 3421 and 9 are 3200 and 8. 32 can be divided by 8 to get 4.

The Compatible Numbers Game. We are told to use estimation to tell whether each estimated quotient is reasonable or unreasonable so we have a bunch of estimated quotients here so someone is estimating that 2419 divided by three is roughly equal to 7500 we have to figure out is that reasonable or unreasonable and then we have two more quotients to figure out if its unreasonable or. The second section shows how to use compatible numbers to estimate division problems with a double-digit divisor.

There is instruction and an example on the page. Answer key is also provided. Compatible numbers are numbers that when added produce a tidy sum one that usually ends in zero or multiples of 10.

Rounding using Compatible numbers in division. Instead of rounding to the greatest place value students must round the dividend to a compatible number or a number that completes a basic fact with the divisor and then divide. For younger students you could use strips of 10 that can be broken up to show the compatible numbers.

In this estimating quotients worksheet learners use compatible numbers to easily estimate 16 quotients. Instead of rounding to the greatest place value students must round the dividend to a compatible number or a number that completes a basic fact with the divisor and then divide. 20 is an integer which can be easily divisible by the nearest integers 4 5 and 10.

38 and 62 are also compatible numbers because when added they total 100 end in zero. And 9 and 1 are considered compatible because when added they total 10 end in zero. Estimating to find the answers to long division problems can be tricky.

Then add a zero at the end to get 20 2. Estimating with Long Division. 3421 9 3.

For various reasons it is easier to compute addition subtraction multiplication and division problems mentally using compatible numbers than numbers that are not compatible. These are two or three digit numbers divided by single digit divisors. Rounding using Compatible numbers in division.

Estimate the following division using compatible numbers. Notice that both numbers were increased. Use as a center practice worksheet or just a quick check.

You can use them to estimate by thinking 500 4205. 232 11 2. Also 70 and 30.

Oct 6 2014 - Knowing how to use Compatible Numbers is very helpful when tackling a long division problem. To complete this center students will estimate the problem in the box using compatible numbers. Thus its nearest compatible numbers would be 20 4 20 5 20 10 which helps for easier arithmetic operations.

The purpose of a We Flip for Math Flip Book is to provide a struggling student with a step-by-step guide to take them through the process they are struggling with. Estimating to find the answers to long division problems can be tricky. 25889 52 1.

Dividing With Compatible Numbers - Displaying top 8 worksheets found for this concept. We can round the numbers to the nearest ten hundred thousand or ten thousand to make them compatible numbers. Compatible numbers are numbers that seem to go together because they are easy to compute mentally.

The compatible numbers are most commonly used for performing division problems mentally. Also included is a 2-sided practice page. Compatible numbers for 232 and 11 are 240 and 12.

This center allows students to practice estimating and dividing using compatible numbers. Some of the worksheets for this concept are Division and multiplication Decimals practice booklet table of contents Fractions and estimation Division witho ut remainder 2 digit by 1 digit s1 Pizzazz book a Decimals and estimation Mental math C h a p t er multiplying and. For example 7 and 3.

To make this concept a. 490 and 550 rounded to the nearest tens or 500 and 500 rounded to the nearest hundreds are much easier to solve. The third section demonstrates how compatible numbers can be used to jump-start the solving of a double-digit division problem.

24 can be divided by 12 to get 2. I have various flip books available in. Shade in the correct answer and move on the shaded pa.

For instance if we have to add 493 and 549 we can make the numbers compatible by rounding them up to the nearest tens or hundreds.

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