in the last right hand digit ？（关于四舍五入）？ 这段话完全可以解决问题的 in mathematics rounding off is writing an answer to a given degree of accuracy. let's round off 314 to the nearest hundred. you know that 314 is closer to 300 than 400, so when we rounded off 314 to the nearest hundred is 300. now let's round off 483 to the nearest hundred. we know that 483 is in between 400 and 500 and it is closer to 500. so, 483 rounded off to the nearest hundred is 500. this is a another way of looking at it: in 483, 4 is in hundreds place 8 is in tens place 3 is in units place hundreds tens units or ones 4 8 3 we want to round off 483 to the nearest hundred.the number to the right of 4 is 8, which is more than 5.so you add 1 to the 4 ie 5 and change the digits in tens and units to zeros 另外： examples (a) round off 483 to the nearest ten. hundreds tens units or ones 4 8 3 in this number 8 represents tens. the number to the right of 8 is 3 which is less than 5, so we round down the number. (b) round off 67.32 to the nearest tenth. tens units tenths hundredths 6 7 3 2 in this number 3 represents tenths. the number to the right of 3 is 2, which is less than 5, so just leave out 2. 67.32 to the nearest tenth is 67.3 rounding off to the nearest tenth is sometimes referred to as rounding off to 1 decimal place. rounding off to the nearest hundredths is sometimes referred to as rounding off to 2 decimal places. (c) round off 16.1982 to 2 decimal places. (d) round off $ 26.7482 to the nearest cent. round off to the nearest cent means round off to the nearest hundredths or round off to two decimal places.查看更多
第1天
关注盖德视界
添加小助手
