Basic Arithmetic : Rounding
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Example Questions
例子问题# 1:Rounding
Round to the nearest hundredth:
The hundredth place is the 2nd number after the decimal. Because the thousandth place is great than 5, we will need to round up to
例子问题# 1:Rounding
Baseballs can only be bought in packages of
1. Round 145 to the nearest 10:
Since there is a 5 in the ones place, 145 rounds up to 150.
2. Divide the rounded number of baseballs by 10 since they come in packages of 10:
150/10=15 packages
例子问题# 1:Operations With Whole Numbers
Round
To round to the nearest ten, you need to take a look at the ones' place. Since the ones' place is greater than
So then
例子问题# 1:Basic Arithmetic
Round
To figure out how to round the ones' place, we need to first look at the digit that's to the right of it. If the digit to the right of the ones' place is less than 5, then we leave the ones' place alone.
Since the tenths place is 1, we will leave the ones place alone.
例子问题# 1:Operations With Whole Numbers
Round
To figure out how to round any number, look at the digit to the right of the place you're supposed to be rounding.
Since we want to round the hundreds place, look to the tens place first. If the tens place is greater than 5, then we round up. If the tens place is less than five, then leave the hundreds place alone.
Because the tens place is 7, we will need to round to 900.
例子问题# 1:Whole Numbers
What is
An important thing to remember when rounding is knowing which place you're rounding to. In this problem, we our rounding to the ten-thousands place, therefore we need to take a look at two things: 1) which number appears in that place, and 2) what number appears immediately after it:
With this number, an
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