Comparing and Rounding Decimals Christine Berg Edited V Hamilton

Decimal Models Equivalent Decimals Number Line Comparing Decimals

TenthHundredth Decimal Models

Decimals that represent the same value Example: 0.6 is equivalent to = 0.60 Equivalent Decimals

Zeroes as last digit(s) of a number can be removed 0.6 = 0.60 Terminal Zeroes

Equivalent Decimals

Comparing Decimals Step 1: Stack all the numbers being compared so that all the place values are lined up

Step 2: Add terminal zeros so there are the same number of decimal places Comparing Decimals

Step 3: Underline the first number that is different in the numbers being compared

Step 4: Looking at the underlined digit, you can not tell which number is larger. It does not matter if there are additional numbers after the digit underlined! THIS NUMBER IS LARGER! Comparing Decimals

Step 4: Order numbers depending on the directions given. Pay close attention to whether you’re supposed to order from least to greatest or greatest to least! Comparing Decimals

Which is greater: 0.6 or 0.58 ?

> 0.58

Which is greater: 0.6 or

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 tenth 2) Round 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