Rounding+to+the+tens+place

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 * =Estimating a sum by [|rounding] to get the best estimate is the goal of this lesson.=

=For numbers with two digits, there can only be one estimate because you can only round to the tens place.= =For example: 72 -->70= =- 36 --> 40=
 * ==When rounding to the nearest ten, if the __last digit__ ends with 1, 2, 3, or 4, round to the next number that is smaller than the number given and ending with a zero.==

For instance, round 43 to the nearest ten. The last digit is 3, so the next number smaller than 43 with an ending of zero is 40.

 * ==On the other hand, if the digit is 5,6,7,8, or 9, round to the next number bigger than the given number and ending with zero.==