3.12给定位值的十进制四舍五入
章节大纲
-
Kalisha has a small bag that weighs 0.879 pounds. She is filling out a form that only allows her to write the weight to the hundredths. The form tells her to round to the nearest hundredths, but she doesn't know how to do that. How can she round 0.879 to the nearest hundredths, and what number should she write on the form?
::Kalisha有一个小袋子,重0.879磅。 她填写了一个表格, 只能让她写到每100磅的重量。 表格告诉她到最近的每100磅, 但是她不知道该怎么做。 她怎么可以把0. 879到每100磅, 表格上应该写到多少?In this concept, you will learn how to round to a given place value .
::在这个概念中,你将学会如何舍入给定的位置价值。Rounding Decimals to a Given Place Value
::将十进制舍入到给定地点值You can use place value to help you round numbers to the nearest whole or tenths, hundredths, thousandths, etc.
::您可以使用位值来帮助您圆数到最近的整或十、十、一百、一千等。Let's look at an example.
::让我们举个例子。Round 0.345 to the nearest tenth.
::0.345回合到最近的第十回合To help you with this, put the number in the place value chart.
::为了帮助您使用这个, 请在位置值图表中输入数字 。Tens Ones Tenths Hundredths Thousandths Ten
::十个Thousandths
::千人 千人. 3 4 5 The 3 is in the tenths place. The 4 is the digit to the right of the tenths place. 4 is less than 5, so leave the 3 alone.
::3位在十分位,4位在十分位右位的位数。4位不到5位,所以别管3位。The answer is 0.3 is the nearest tenth.
::答案是0.3是最近的十分之一。You could have put zeros to represent the other digits, but that isn’t necessary.
::你可以用零来代表其他数字,Let's look at another example.
::让我们再举一个例子。Round 0.567 to the nearest hundredth.
::第0.567回合到最近的第一百回合To help with this, let’s use the place value chart again.
::让我们再次使用地价图,Tens Ones Tenths Hundredths Thousandths Ten
::十个Thousandths
::千人 千人. 5 6 7 The 6 is in the hundredths place. The 7 is the digit to the right of the hundredths place. Since 7 is 5 or greater, round up to the next digit. The 6 becomes a 7.
::6 位居第100位。 7位位位居第100位右侧。 自 7 位居第 5 位或 5 位以上, 轮到 下一位数。 6 位居第 7 位居第 7 位。 6 位居第 7 位居第 7 位。The answer is 0.57.
::答案是0.57Notice that the five is included because it is to the left of the place you are rounding .
::请注意,这五人被包括在内 因为它是左边 你正在四舍五入的地方。Examples
::实例Example 1
::例1Earlier, you were given a problem about Kalisha and her bag.
::早些时候,你得到一个问题 关于Kalisha和她的包。Round 0.879 to the nearest hundredths for her and write the value that she should put on the form.
::第0.879回合到最近的第一百回合 写下她应该填的表格上的价值First, put the number in the place value chart.
::首先,把数字放在地点值图表中。Tens Ones Tenths Hundredths Thousandths Ten
::十个Thousandths
::千人 千人. 8 7 9 Next, determine if the number to the right of the hundredths place is 5 or greater.
::下一步,确定第一百位右侧的数值是5或5以上。Yes, it is greater.
::是的,这是更大的。Then, round the number in the hundredths place to the next value.
::然后,将第一百个位数乘以下一个值。0.88
The answer is 0.88. Kalisha should write 0.88 on the form.
::答案是0.88,Kalisha应该在表格上写0.88。Example 2
::例2Round 0.221 to the nearest tenth.
::第0.221回合至最近的第十回合。First, put the number in the place value chart.
::首先,把数字放在地点值图表中。Tens Ones Tenths Hundredths Thousandths Ten
::十个Thousandths
::千人 千人. 2 2 1 Next, determine if the number to the right of the tenths place is 5 or greater.
::下一步,确定十分位右侧的数值是5或5以上。No
::否 无Then, leave the number in the tenths place the same.
::然后把数字保留在十分位数相同的地方。0.2
The answer is 0.2.
::答案是0.2。Example 3
::例3Round 0.892 to the nearest tenth.
::第0.892回合至最近的第十回合。First, put the number in the place value chart.
::首先,把数字放在地点值图表中。Tens Ones Tenths Hundredths Thousandths Ten
::十个Thousandths
::千人 千人. 8 9 2 Next, determine if the number to the right of the tenths place is 5 or greater.
::下一步,确定十分位右侧的数值是5或5以上。Yes
::是 是Then, round the number in the tenths place to the next value.
::然后将十分位数乘以下一个值。0.9
The answer is 0.9.
::答案是0.9Example 4
::例4Round 0.632 to the nearest hundredth.
::0.632回合到最近的第一百回合First, put the number in the place value chart.
::首先,把数字放在地点值图表中。Tens Ones Tenths Hundredths Thousandths Ten
::十个Thousandths
::千人 千人. 6 3 2 Next, determine if the number to the right of the hundredths place is 5 or greater.
::下一步,确定第一百位右侧的数值是5或5以上。No
::否 无Then, round the number in the hundredths place to the next value.
::然后,将第一百个位数乘以下一个值。0.63
The answer is 0.63.
::答案是0.63。Example 5
::例5Round 0.1238 to the nearest thousandths.
::1238回合到最近的千位数First, put the number in the place value chart.
::首先,把数字放在地点值图表中。Tens Ones Tenths Hundredths Thousandths Ten
::十个Thousandths
::千人 千人. 1 2 3 8 Next, determine if the number to the right of the thousandths place is 5 or greater.
::下一步,确定千位右侧的数值是5或5以上。Yes
::是 是Then, round the number in the thousandths place to the next value.
::然后,将千位数的数值折到下一个值。0.124
The answer is 0.124.
::答案是0.124。Review
::回顾Round according to place value.
::按地点值排列的回合。-
Round 0.45 to the nearest tenth
::第10轮至最近的第10轮第0.45轮 -
Round 0.67 to the nearest tenth
::第0.67轮至最近的第十轮 -
Round 0.123 to the nearest tenth
::第0.123轮至最近的第十轮 -
Round 0.235 to the nearest hundredth
::第0.235回合至最近的第一百轮 -
Round 0.567 to the nearest hundredth
::第0.567回合至最近的第一百回合 -
Round 0.653 to the nearest hundredth
::第0.653回合至最近的第一百轮 -
Round 0.2356 to the nearest thousandth
::第0.2356回合至最近的千位 -
Round 0.5672 to the nearest thousandth
::0.5672回合至最近的千位 -
Round 0.8979 to the nearest thousandth
::第0.8979回合至最近的千位 -
Round 0.1263 to the nearest thousandth
::第0.1263轮至最近的千位 -
Round 0.056 to the nearest tenth
::第0.056轮至最近的第十轮 -
Round 0.0091 to the nearest hundredth
::回合0.0091至最近的第一百次 -
Round 0.0918 to the nearest tenth
::0.0918轮至最近的第十轮 -
Round 0.0023 to the nearest thousandth
::0.0023回合至最近的千位 -
Round 0.1368 to the nearest hundredth
::0.1368至最近的第一百轮
Review (Answers)
::回顾(答复)Click to see the answer key or go to the Table of Contents and click on the Answer Key under the 'Other Versions' option.
::单击可查看答题键, 或转到目录中, 单击“ 其他版本” 选项下的答题键 。Resources
::资源
-
Round 0.45 to the nearest tenth