Question

List all numbers which are rounded off to the nearest tens as 240

Answer 1

Step-by-step explanation:

235, 236, 237, 238 , 239 , 240, 241, 242, 243 ,244,

Answer 2

Concept:

Rounding off:  Rounding off a number means making a number simpler to use but keeping its value close to its original value. The result of rounding off is less accurate but easier to use.

We round off a number to a specific place value. For example, we round off a number to nearest ones, nearest tens, nearest hundreds, and so on.

In the given question, we need to round off to the nearest tens.

Rounding off to nearest tens:

(i) If the digit at ones place of a number is less than 5 (between 0 and 4), then we replace the digit at ones place with 0.

(ii) If the digit at ones place is equal to or greater than 5, then we replace the digit at ones place with 0 and the digit at tens place is increased by 1.

Answer:

The numbers which are rounded off to the nearest tens as 240 are 235, 236, 237, 238, 239, 240, 241, 242, 243, and 244.

Explanation:

According to rule (ii), the numbers 235, 236, 237, 238, and 239 give 240 when rounded off.

According to rule (i), the numbers 240, 241, 242, 243, and 244 give 240 when rounded off.

Hence, the required numbers are 235, 236, 237, 238, 239, 240, 241, 242, 243, and 244.

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