6 6
Look at the next digit.
8 9
8.92 is the least.
1 3
9.615 9.631
8.92 8.920
9.631
9.615
8.920
9.631
9.615
8.920
9.631
9.615
8.920
9.631
9.61 5
8.920
III.Round Whole Numbers and Decimals
To round a number:
- Find the digit in the place to which you are rounding.
- Look at the next digit on the right.
If that digit is less than5, then the first digit does not change.
If that digit is 5 or greater, then round the first digit up. - When rounding whole numbers, replace all digits to the right of the place to which
you are rounding with zeros.
When rounding decimals, drop all digits to the right of the place to which
you are rounding.
Practice Exercises
408 Skills Update
IV.Compare and Order Decimals
Compare decimalsthe same way you compare whole numbers. Align digits
by place value. Start at the left. Check each place until the digits are different.
Compare 6.2 and 6.17.
6.20 6.20
6.17 6.1 7
So 6.2 is greater than 6.17.
You can order decimals from least to greatest or from greatest to least
the same way you order whole numbers. Align digits by their place values.
Start at the left and check each place until the digits are different.
Order from least to greatest: 9.631; 9.615; 8.92.
Round 8,437 to the nearest hundred.
8,437
8,400
Round 129,502 to the nearest thousand.
129,502
130,000
Think
3 5, so the 4 in the
hundreds place does
not change.
Think
5 5, so the 29 thousands
rounds up to 30 thousands.
Round 0.3628 to the nearest thousandth.
0.3628
0.363
Think
8 5, so the 2 in the
thousandths place
rounds to 3 thousandths.
Think
6 5, so 9 tenths
rounds up to 10 tenths.
Regroup as 1.
Think
6 6 and 0.2 0.1
So the order from least to greatest is 8.92; 9.615; 9.631.
6.2 6.20
Round 0.96779 to its greatest nonzero place.
0.96779