Use rounding or compatible numbers to estimate the sum. 222+203

The sum of 222 + 203 by using rounding to compatible number is 420

Rounding results on integers can be used to estimate or determine the results of a calculation. Estimates can be used as a reference or comparison in determining the truth of the results of a calculation

To rounding integers to the nearest hundreds, look at the tens

1. If the tens are less than 5 (1-4), then the unit number is omitted

Example: 735 ---> 700

2. If the tens are 5 to 9 then the tens are rounded up to 1 hundred

Example: 279 ----> 300

Whereas compatible numbers are the numbers that are easy to add, subtract, multiply, or divide. The value of Compatible numbers will be close to the actual numbers

So We can round the numbers to the nearest ten, hundred, etc. to make them compatible numbers

In the summation operation above we will round out the numbers:

we round the number to the nearest ten become 220

we round the number to the nearest ten become 200

So the sum results become:

220 + 200 = 420

Describe how to round 678 to the nearest hundred

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Rounding to the nearest hundredth of a meter.

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Round 32,697 to the nearest tenth, hundredth, and one.

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Keywords: rounding, nearest ten, addition operation

22 dimes and 9 nickels

step-by-step explanation: