To round off kilometers to the nearest 10, you would look at the digit in the tens place. If the digit in the ones place is 5 or greater, you would round up by adding 10 to the tens place. If the digit in the ones place is less than 5, you would keep the tens place the same. For example, if you have 47 km, you would round it to 50 km.
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When rounding to a specific place, take a look at the digit immediately to the right of the target, in this case, the ones place. If that digit is 4 or less, zero everything to the right of the target out. If that digit is 5 through 9, increase the target by one and zero everything to the right of it out. If the target is a 9, increasing it will turn it to zero and increase the digit to the left of the target by one.
You look for a number in the 10 times table which is nearest to the distance which you have.
To convert 9 km 700 m to the nearest kilometer, we need to consider the meters. Since 700 meters is closer to 1 km than 2 km, we round down to the nearest kilometer. Therefore, 9 km 700 m is approximately 10 km when rounded to the nearest kilometer.
12.0 km
3 km
That depends on what you have 10864 of. If that's 10864 km, then it is already rounded to the nearest km. If it's 10864 something elses, you should tell us what it is.
To convert 3 km 600 m to the nearest kilometer, we need to consider the meters. Since 600 meters is more than half of a kilometer, we would round up to the nearest kilometer. Therefore, 3 km 600 m is equivalent to 4 kilometers.