MCA Math Test Prep 5th Grade Rounding Decimals

Andrew has a file on his computer that is 144.138 megabytes in size. What is this number rounded to the nearest hundredth of a megabyte?

• 100 megabytes

• 144.1 megabytes

• 144.13 megabytes

• 144.14 megabytes

Answer explanation

Remember! A HUNDREDTH is two place values to the RIGHT of the decimal!

144.138

We know that when we round, we look to the number to the right to figure out if it rounds up or down.

144.138 becomes 144.14

Tags

CCSS.5.NBT.A.4

What is 10.319 rounded to the nearest tenth?

• 10

• 10.3

• 10.32

• 10.4

Answer explanation

Remember! A TENTH is one place values to the RIGHT of the decimal!

10.319

We know that when we round, we look to the number to the right to figure out if it rounds up or down. We then drop any numbers to the right of the tenths place.

10.319 becomes 10.3

Tags

CCSS.5.NBT.A.4

The price of one gallon of heating oil is $2.689. What is this number rounded to the nearest penny?

• $2.68

• $2.69

• $2.70

• $3.00

Answer explanation

Remember! A penny is in the hundredths place. A HUNDREDTH is two place values to the RIGHT of the decimal!

$2.689

We know that when we round, we look to the number to the right to figure out if it rounds up or down. We drop the number after the hundredths!

$2.689 becomes $2.68

Tags

CCSS.5.NBT.A.4

What is the number rounded to the nearest underlined digit?

5.1593

• 5.15

• 5.15103

• 5.159

• 5.160

Answer explanation

We know that when we round, we look to the number to the right to figure out if it rounds up or down.

5.1593 becomes 5.159

Tags

CCSS.5.NBT.A.4

What is 8.952 rounded to the nearest tenth?

• 8

• 8.9

• 8.95

• 9

Answer explanation

Remember! A TENTH is one place values to the RIGHT of the decimal!

8.952

We know that when we round, we look to the number to the right to figure out if it rounds up or down.

8.952 becomes 9

This is because 9 tenths turns into 10 tenths which equals one whole!

Tags

CCSS.5.NBT.A.4

A traveler weighs her suitcase before boarding an airplane. The suitcase weighs 21.148 pounds. What is the weight of the suitcase rounded up to the nearest tenth of a pound?

• 21.1 pounds

• 21.15 pounds

• 21.2 pounds

• 21.25 pounds

Answer explanation

Remember! A TENTH is one place values to the RIGHT of the decimal!

21.148

We know that when we round, we look to the number to the right to figure out if it rounds up or down. We then drop the numbers to the right

21.148 becomes 21.1

Tags

CCSS.5.NBT.A.4

Evan divides 2 by 7 with his calculator. The calculator says the quotient is 0.2857. What is the quotient rounded to the nearest thousandth?

• 0.285

• 0.286

• 0.29

• 0.3

Answer explanation

Remember! A HUNDREDTH is two place values to the RIGHT of the decimal!

0.2857

We know that when we round, we look to the number to the right to figure out if it rounds up or down. We then drop the number after it!

0.2857 becomes 0.286

Tags

CCSS.5.NBT.A.4

The price of a large coffee is $1.64. What is the price rounded to the nearest tenth of a dollar?

• $1.60

• $1.65

• $1.70

• $2.00

Answer explanation

Remember! A HUNDREDTH is two place values to the RIGHT of the decimal!

$1.64

We know that when we round, we look to the number to the right to figure out if it rounds up or down. Because we are working with money, the hundredths becomes a zero!

$1.64 becomes $1.60

Tags

CCSS.5.NBT.A.4