Question

Make an estimation of $443+890$ if we round up the numbers to the nearest hundred.

• A. $1300$
• B. $1400$
• C. $1200$

Answer 1

The correct option is A $1300$

Let's round off the numbers one by one.

$443$ needs to be rounded off to the nearest hundred. We observe the tens place value. Here it is $4$ and we know $4<5$ so $443$ ideally would be rounded down to $400$.



Similarly, with $890$, $9>5$ so in this case we round it up to $900$.



Now, doing the summation, $400+900=1300$ which is a pretty good estimation!