Rounding Decimals
Round 3.9 to the nearest whole number.
4
Remember:
-whole number means ones place
Use <,>, or = to complete the expression below:
3.92 ____ 3.920
3.92 = 3.920
Remember:
-adding zeros after the last decimal value does not change the value of the number
Find the sum:
2.6 + 12. 65
15.25
Remember:
-line up the decimal point so you line up digits by place value
2.3 x 5
11.5
Remember:
-regroup to the next place on the left if your partial sum is over 9
Notebook: $3.25
Pencil: $1.25
How much would a notebook and pencil cost?
$4.50
Round 13.913 to the nearest tenths place.
13.9
Remember:
-tenTHS is not the same as tenS
Use <,>, or = to complete the expression below:
99.905 ___100.2
99.905 < 100.2
Remember:
-the comparison symbol OPENS to the larger value
-more digits doesn't always mean larger value
Find the difference:
9.23 - 5.1
4.13
Remember:
-line up the decimal point so you line up digits by place value
12.3 x 4
49.2
Remember:
-you can use generic area model to find partial products
Notebook: $3.25
Pencil: $1.25
Pack of markers: $2. 75
How much would all three items cost altogether?
$7.25
Round 23.985 to the nearest hundredths place.
23.99
Remember:
-if the digit on the right of the target place is 5 or more, then the target number rounds UP
Use <,>, or = to complete the expression below:
3 tenths ___ 3 hundredths
3 tenths > 3 hundredths
Remember:
-tenths are like dimes and hundredths are like pennies
8-3.24
4.76
Remember:
-a whole number implies a decimal point on the right of the ones place
-place zeros in empty places
9.201 x 3
27.603
Remember:
-0 times any number is zero
Notebook: $3.25
Pencil: $1.25
Pack of markers: $2. 75
If I bought all three items and paid with a $10.00 bill, how much change will I get back?
$2.75
Which number rounds to 13.5?
A) 13.59
B) 13.51
C) 13.55
B) 13.51
Remember:
-round each answer choice to see which one is correct
Use <,>, or = to complete the expression below:
32 tenths ____ 3.2
32 tenths = 3.2
Remember:
-label the place value of each digit to see its unit form
Find the sum:
32.98 + 32 tenths
36.18
Remember:
-write numbers in the same form before operating
4.5 / 3
"/" means "divided by"
1.5
Remember:
-use place value discs
-unbundle to the next value to the right
Notebook: $3.25
Pencil: $1.25
Pack of markers: $2. 75
How much would 2 notebooks and 3 pencils cost altogether?
$10.25
Which TWO numbers round to 23.98?
A) 23.981
B) 23.978
C) 23.972
A) 23.981
B) 23.972
Use <,>, or = to complete the expression below:
3.201 __ three and twenty-one thousandths
3.201 > three and twenty-one thousandths
(3.201 > 3.021)
Find the difference:
51.021 - 4.9
46.121
1.26 / 4
0.365
Remember:
-add zeros after the last decimal place if there is a remainder, and keep dividing
Notebook: $3.25
Pencil: $1.25
Pack of markers: $2. 75
If I had $20.00, and I HAVE TO buy 5 notebooks, what is the most number of pencils I can buy with the leftover money I have?
3 pencils