There are 1000 metres in one kilometre. Therefore, 736 metres is equal to 736/1000 = 0.736 kilometres.
736
700
700
740
Oh, what a happy little question! To round 736 to the nearest 100, we look at the tens place, which is 30. Since 30 is closer to 0 than 100, we round down to 700. Just remember, there are no mistakes in rounding, only happy little accidents!
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1000