Rounding Knowledge Unit 1

What is
rounding?

Rounding means to change a

number to the nearest ten,

hundred, or thousand. Look at

the digit to the right of the place

value being rounded.

Why is
rounding
important?

Rounding helps simplify numbers

and make estimations. It's like

reading numbers on a scale -

rounding to the nearest pound

gives a quick idea of weight.

Rules for rounding

If the digit is 5 or greater, round up.

Identify the digit to the right of the place you want to

round.

If the digit is less than 5, round down.

Rounding to the
nearest ten

Rounding to the nearest ten involves looking at the

ones digit of the number you are rounding. If it is 5 or

more, round up. If it is less than 5, round down.

Rounding to
the nearest
hundred

Rounding to the nearest hundred

means estimating the value of a

number to the closest hundred.

Look at the tens digit to round up

or down.

Rounding to the
nearest thousand

Rounding is a useful skill to simplify large numbers

while preserving their general value. To round to the

nearest thousand, look at the hundreds place.

Practice exercises help students master

math concepts. Encourage your 4th

grader to solve problems from a math

problems book for better grades.

Practice exercises

Thank you for letting me
share my knowledge
with you!