The sum of 222 + 203 by using rounding to compatible number is 420
Further explanation
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
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Keywords: rounding, nearest ten, addition operation
