To round a number to a particular digit, look at the digit immediately to the right of your target, in this case, the hundredths place. If that digit is 4 or lower, zero it and everything to the right of it out. If that digit is 5 or higher, increase the target digit by one and zero everything to the right of it out. If your target digit is a 9, increasing it will turn it to zero and increase the digit to the left of it by one.
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Oh, dude, it's like super easy. To round to the nearest tenth of a kilometer, you just look at the number in the hundredths place. If it's 5 or more, you round up; if it's less than 5, you round down. So, like, if you have 3.46 kilometers, you'd round it to 3.5 kilometers. Easy peasy!
1.90
9.25 is approximate to:10 to the nearest ten9 to the nearest whole number/unit9.3 to the nearest tenth
It ends in a 9, so will round up, leaving 1.90 as the answer.
1.89 to the nearest tenth is 1.9
1.89 to the nearest tenth is 1.9