Rounding Decimals Steps
"Find the rounding place and put a line under it."
What STEP is this when you are rounding decimals?
Step 1
4.1 or 4.09
Which decimal is greater?
4.1
2.34+7.89
10.23
5.6-2.3
3.3
Say/write the following number in words:
1.57
one and fifty seven hundredths
5 or more, up the score.
4 or less, give it a rest (the number stays the same.)
What step is this?
Step 3
Is one and four tenths greater than 1 4/10?
They are equal!
8.2+1.4
9.6
7.4-5.60
1.80
Say/write the following number in words:
2.180
two and one hundred eighty thousandths
What is step 4 of rounding decimals?
Hint: look at your Rounding Decimals worksheet!
Everything to the left of the rounded number stays the same. Everything else gets removed.
Is zero and four hundredths equal to zero and four tenths?
4/100
4/10
Yes!
2.5+6.4
8.9
9.47-5.25
4.22
Say/write the following number in words:
4.676
four and six hundred seventy six thousandths
Describe and show (on the board) how you would do step 2 when rounding a decimal using this number:
Round to the nearest tenth:
2.275
2.3
Which decimal is greater?
4.50
4.09
4.50
15+2.34
17.34
12.24-6.23
6.01
21.32
twenty one and thirty two hundredths
Use your rounding decimal steps to round the following number to the nearest hundredth
246.923
246.92
Which decimal is greater?
6.70
7.60
7.60 is greater than 6.70
22.25+20.40
42.65
Round the following numbers to the nearest tenth:
6.17
4.56
AND then subtract your new numbers from each other!
6.2
4.6
Final answer: 1.6
245.21
two hundred forty five and twenty one hundredths