Rounding Numbers

•Round the following numbers to the nearest ten:

a)12,432 →

b)1,479 →

c)45 →

Examples

•To round a number to the nearest ten

Ø Underline the tens

Ø Then look at the ones

Ø If the ones ≥ 5 then add one to the tens and replace ones with 0

Ø If the ones < 5 then keep the tens and replace ones with 0

•Round the following numbers to the nearest hundred:

a)12,432 →

b)1,479 →

c)752 →

Examples

•To round a number to the nearest hundred

Ø Underline the hundreds

Ø Then look at the tens

Ø If the tens ≥ 5 then add one to the hundreds and replace tens and ones with 0s

Ø If the tens < 5 then keep the hundreds and replace tens and ones with 0s

•Round the following numbers to the nearest thousand:

a)38,172 →

b)1,679 →

c)3,475,547 →

Examples

•To round a number to the nearest thousand

Ø Underline the thousands

Ø Then look at the hundreds

Ø If the hundreds ≥ 5 then add one to the thousands and replace hundreds, tens and ones with 0s

Ø If the hundreds < 5 then keep the thousands and replace hundreds, tens and ones with 0s