【双语阅读】五年级英语（十六）Rounding off Numbers
【双语阅读】五年级英语（十六）Rounding off Numbers
Rounding off Numbers
数字的四舍五入
How do you round numbers like 32 and 38 to the nearest ten?
你如何把32和38两个数字用四舍五入取到十位数呢？
(1) First see what two tens a number is between. Both 32 and 38 are between 30 and 40.
(1) 首先，看看数字是介于哪两个十位数之间。32和38都介于30和40之间。
(2) Then see which ten a number is closer to. If the one's digit is less than 5, round to the lesser ten. If the one digit is 5 or greater, round to the greater ten.
(2) 然后再看哪一个十位数最接近你要四舍五入的数字。如果数字低于5，则四舍五入到较小的十位数。如果数字等于或是高于5，则四舍五入到较大的十位数。
From the rule, we know 32 rounds up to 30, and 38 rounds up to 40.
根据上面的规则，我们知道32四舍五入后等于30，而38则等于40。
