Rounding to the nearest 10 & 100

Front

What does it mean to round a number?

Back

Rounding a number means adjusting it to the nearest specified value, such as the nearest ten or hundred.

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

Front

How do you round a number to the nearest 10?

Back

Look at the digit in the ones place. If it's 5 or more, round up. If it's 4 or less, round down.

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

Front

Round 34 to the nearest 10.

Back

30

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

Front

Round 67 to the nearest 10.

Back

70

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

Front

What is the nearest 100 to 250?

Back

300

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

Front

How do you round a number to the nearest 100?

Back

Look at the digit in the tens place. If it's 5 or more, round up. If it's 4 or less, round down.

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

Front

Round 215 to the nearest 100.

Back

200

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

Front

Round 478 to the nearest 100.

Back

500

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

Front

Estimate 29 + 46 = ?

Back

30 + 50 = 80

Front

Estimate 85 + 37 = ?

Back

80 + 40 = 120