Explain how to estimate 368+231 two different ways

The two different ways of addition are mentioned above.

Given that,
To estimate 368+231 two different ways.

What is arithmetic?

In mathematics, it deals with numbers of operations according to the statements. There are four major arithmetic operators, addition, subtraction, multiplication, and division,

Here,
One way,
= 368 + 231
= 400 - 32 + 200 + 31
= 600 - 1
= 599

Second way
= 368 + 231
= 300 + 68 + 200 + 31
= 500 + 99
= 599

Thus, the two different ways of addition are mentioned above.

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we know that

One very simple form of estimation is rounding.

To round off whole numbers:

Find the place value you want (the "rounding digit") and look to the digit just to the right of it.

If that digit is less than , do not change the "rounding digit" but change all digits to the right of the "rounding digit" to zero.

If that digit is greater than or equal to , add one to the rounding digit and change all digits to the right of the rounding digit to zero.

Part a) Estimate rounding the numbers to nearest hundreds

------> round up to

------> round down to

so

therefore

the answer part a) is

Part b) Estimate rounding the numbers to nearest tens

------> round up to

------> round down to

so

therefore

the answer part b) is