– Approximation means rounding off.
There are two ways to round off a number;
– Round up
– Round down
When rounding off a number;
1.According to the question, if the number you are rounding is followed by a number from 5 to 9, round the number up.
Round 5291 to the nearest hundred: 5291 ≈ 5300
2. According to the question, if the number you are rounding is followed by a number from 1 to 4, round the number down.
Round 5231 to the nearest hundred: 5231 ≈ 5200
E.g. Round off the numbers 1234 and 1267 to the nearest 10.
1234 ≈ 1230
Since 3 is less than 5, we round down the number.
1267 ≈ 1270
Since 6 is more than 5, we round up the number.