Question

Which of these will estimate to 109 when estimated to nearest natural number.

• A. 109.2
• B. 108.7
• C. 108.45
• D. 108.123

Answer 1

Answer: (A), (B)

108.7

Step 1: Locate the number mentioned in the nearest place value (nearest natural number) i.e ones place

Step 2: Look at the digit to the right of the digit you want to estimate i.e (tenths place)

Step 3: Follow the rule: If you see a digit nearest to natural number greater than 5, round up. If it is less than 5, round down.

Let's analyse option A - 109.2.
Step 1: Digit at ones place is 9
Step 2: Digit on tenths place is 2
Step 3: 2 is less than 5 so, 109.2 rounds down to 109.

Let's analyse option B - 108.7.
Step 1: Digit at ones place is 8
Step 2: Digit on tenths place is 7
Step 3: 7 is more than 5 so, 108.7 rounds up to 109.


Let's analyse option C-108.45.
Step 1: Digit at ones place is 8
Step 2: Digit on tenths place is 4
Step 3: 4 is less than 5 so, 108.45 rounds down to 108.


Let's analyse option D-108.123.
Step 1: Digit at ones place is 8
Step 2: Digit on tenths place is 1
Step 3: 1 is less than 5 so, 108.45 rounds down to 108.