Rounding decimals
Name
The Big Roundup (or Down!)
When rounding, if the number is 5 or more, round up. If the number
is 4 or less, round down.
6.34 = 6.3
3.6 = 4
9.66 = 9.7
8.4 = 8
When rounding to the
nearest whole number,
look at the tenths digit.
When rounding to the
nearest tenth, look at the
hundredths digit.
Write each decimal and the rounded number in the correct box.
A. Round to nearest whole number.
4.1
4.5
.
.
.
.
.
.
3
4.9
.
2
3.7
5.2
.
3.4
4
5.8
.
2.9
.
2.6
2.2
5
4 or less, round down!
6
5 or more, round up!
2.2 = 2
8.2
.
.
.
. .
.
.
7
8.5
9.1
.
6
7.9
9.3
.
7.4
8
9.8
.
7.2
.
6.4 6.5
6.1
9
4 or less, round down!
10
5 or more, round up!
B. Round to nearest tenth.
.
5.34
5.4
5 or more, round up!
7.55
7.64
.
.
.
.
.
7.5
7.6
.
4 or less, round down!
Scholastic Success With Fractions and Decimals: Grade 5, © Scholastic Teaching Resources
7.69
.
7.51
5.5
7.72
.
. .
.
7.48
5.49
7.75
.
.
7.4
7.45
5.44
5.3
4 or less, round down!
7.42
5.38
7.7
7.78
.
.
5.2
5.31
.
5.1
5.28
.
5.23
.
5.19
.
5.14 5.15
7.8
5 or more, round up!
35
Page 35
A. 2.2 = 2, 3.4 = 3, 4.1 = 4,
5.2 = 5; 2.6 = 3, 2.9 = 3,
3.7 = 4, 4.5 = 5, 4.9 = 5,
5.8 = 6; 6.1 = 6, 6.4 = 6,
7.2 = 7, 7.4 = 7, 8.2 = 8,
9.1 = 9, 9.3 = 9; 6.5 = 7,
7.9 = 8, 8.5 = 9, 9.8 = 10;
B. 5.14 = 5.1, 5.23 = 5.2,
5.31 = 5.3, 5.34 = 5.3, 5.44
= 5.4; 5.15 = 5.2, 5.19 =
5.2, 5.28 = 5.3, 5.38 = 5.4,
5.49 = 5.5; 7.42 = 7.4, 7.51
= 7.5, 7.64 = 7.6, 7.72 =
7.7; 7.45 = 7.5, 7.48 = 7.5,
7.55 = 7.6, 7.69 = 7.7, 7.75
= 7.8, 7.78 = 7.8