In mathematics, compatible numbers space the numbers the are easy to add, subtract, multiply, or divide mentally. Compatible numbers are close in worth to the yes, really numbers that make estimating the answer and computing troubles easier.

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We can round the number to the nearest ten, hundred, thousand or ten thousands to make them compatible numbers. For instance, if we have to add 493 and 549, we deserve to make the numbers compatible by rounding them up to the nearest tens or hundreds. 490 and 550 (rounded to the nearest tens) or 500 and also 500 (rounded come the nearest hundreds) are much less complicated to solve.

Let us see some examples to understand how we can perform subtraction, multiplication and department using compatible numbers.


Find the difference between 376.5 and also 612.2

Here, we cannot uncover the difference in between 376.5 and also 612.2 conveniently as they room not compatible. So, we make the numbers compatible by round off both the number to the nearest tens.

Actual Difference

Difference using Compatible Numbers


376.5 transforms to 380

612.2 transforms to 610

610 - 380 = 230


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 usage compatible numbers and also find the product i m sorry is closer to the yes, really answer.

Actual Product

Product making use of Compatible Numbers


24.3 alters to 24

18.7 alters to 20

24 × 20 = 480


Divide 856 by 33.

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To uncover the answer to 856 ÷ 33, will certainly take united state time as we have to divide to obtain the answer.

However, if us make the numbers compatible, we have the right to mentally find solution close come the actual answer together shown,

Actual Division

Quotient utilizing Compatible Numbers


856 transforms to 900

33 transforms to 30

900 ÷ 30 = 30