Comparing and Rounding Decimals

Christine BergEdited V Hamilton

1000 = thousand100 = hundred10 = ten1 = one0.1 = tenth0.01 = hundredth0.001 = thousandth0.0001 = ten-thousandth

Decimal Places

Reading Decimals

Step 1:Read the number before the decimal

point

Reading Decimals

Step 2. Read the decimal

point as “and”

Reading Decimals

Step 3:Read the number after the decimal

place

Step 4:Follow the second number with the

place value of the last digit Hint

Reading Decimals

Hint.05

Draw and imaginary line underneath

Reading Decimals

Hint .05

Reading Decimals

Place a 1 under the decimalPlace zeroes under each of the following numbers

. 05100

. 05 100 is read as five hundredths

Reading Decimals

•Decimal Models•Equivalent Decimals

•Number Line

Comparing Decimals

Tenth Hundredth

Decimal Models

• Decimals that represent the same value

• Example: 0.6 is equivalent to 0.60

0.6 = 0.60

Equivalent Decimals

•Zeroes as last digit(s) of a number can be removed

0.6 = 0.60

Terminal Zeroes

0.6 0.60

Equivalent Decimals

Comparing DecimalsStep 1:

Underline the first number that is different in the numbers being

compared

Step 2:Add terminal zeros so

there are the same number of decimal

places

Comparing Decimals

Step 3:Remove the decimal point

Comparing Decimals

Step 4:Order numbers

depending on the directions given

Comparing Decimals

Step 5:Replace decimal point and remove terminal

zeroes

Comparing Decimals

Which is greater:

0.6 or 0.58 ?

0.60 0.58

0.6 > 0.58

Which is greater:

0.6 or 0.58

0.6 0.58

Step 1: Underline decimal

place we are rounding

Rounding Decimals

Step 2:Circle the number to

the right of the underlined decimal

place

Rounding Decimals

Step 3:If circled digit is greater than or equal to 5, then

round the underlined number up (add one)

Rounding Decimals

Step 4:If circled digit is less

than or equal to 4, leave the

underlined number the same

Rounding Decimals

Try these:1)Round 1.05 to the

nearest tenth2) Round 0.123 to the

nearest tenth

Rounding Decimals

Answers:1) 1.1

2) 0.12

Rounding Decimals

Describe what you learned today about

either reading OR rounding decimals.

In your Own Words