Ordering Decimals

Ordering Decimals

by Joanne Casanova

​Objectives

​Write measurements in order (ascending/descending)

​Compare decimals

​Compare numbers with different unit

​SYMBOLS FOR COMPARING NUMBERS

​In Mathematics we use FOUR symbols to compare numbers

Multiple Choice

Complete the statement with the correct symbol:

4.23 _ 4.54

• >

• <

• =

Multiple Choice

Complete the statement with the correct symbol:

5.055 _ 5.505

• >

• <

• =

Multiple Choice

Complete the statement with the correct symbol:

0.27 _ 0.03

• >

• <

• =

Multiple Choice

Complete the statement with the correct symbol:

2cm _ 20mm

• >

• <

• =

​To order decimals...

1. ​Compare the whole number part first.

2. When the whole number parts are the same, compare the tenths, then the hundredths and so on.

​

​

​When you order decimal measurements, make sure that they are all in the same units. Remember the conversion factors.

Multiple Choice

Complete the statement:

6.7L _ 670mL

• $$=$$  

• $$\ne$$  

Multiple Choice

Complete the statement:

0.85km _ 850m

• $$=$$  

• $$\ne$$  

Multiple Choice

Complete the statement:

7800m _ 0.8km

• $$<$$  

• $$>$$  

​Two Ways to Arrange Numbers

​1. Ascending Order (smallest to biggest)

​2. Descending Order (biggest to smallest)

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​

Multiple Choice

Which of these is arranged in ascending order?

• 1.25 1.52 1.02 1.50

• 1.52 1.02 1.50 1.25

• 1.02 1.50 1.25 1.52

• 1.02 1.25 1.50 1.52

Multiple Choice

Order these numbers from greatest to least

0.25, 0.89, 0.56, 0.99

• 0.99, 0.56, 0.89, 0.25

• 0.25, 0.56, 0.89, 0.99

• 0.99, 0.89, 0.56, 0.25

• 0.89, 0.56, 0.25, 0.99

​Ordering different measurements

​When the measurements are not the same, use conversion to have the same measurements before ordering the numbers.

Multiple Choice

Write these measures from least to greatest.

2.3 kg, 780 g, 1950 g

• 780 g, 1950 g, 2.3 kg

• 2.3 kg, 780 g, 1950 g

• 2.3 kg, 1950 g, 780 g

• 2.3 kg, 780 g, 1950 g

Multiple Choice

Write these measures from least to greatest.

0.55L, 95mL, 0.9L, 450mL

• 0.9L, 0.55L, 450mL, 95mL

• 0.55L, 0.9L, 95mL, 450mL

• 95mL, 450mL, 0.55L, 0.9L

• 95mL, 0.9L, 450mL, 0.55L

Multiple Choice

Write in  descending order.

0.08t, 920kg, 0.15t, 50kg

• 920kg, 50kg, 0.15t, 0.08t

• 920kg, 0.15t, 0.08t, 50kg

• 0.15t, 0.08t, 920kg, 50kg

• 50kg, 0.08t, 0.15t, 920kg

​Classwork in Assignment Tab