4.2.F

Compare & Order Decimals 4th Grade

Texas Essential Knowledge and Skills (TEKS): 4.2.F
compare and order decimals using concrete and visual models to the hundredths;

Decimals can be compared using models.

Base ten blocks can be used to compare decimals.
In this case, a flat represents 1, a rod represents 0.1, and a unit represents 0.01.

0.1

0.01

Example:

The model on the left is made up of five rods, so it represents 0.5.

The model on the right is made up of two rods, so it represents 0.2.

The model on the left has more rods than the model on the right.

So, a comparison shown by the models is 0.5 > 0.2.

Decimals can be compared using models.

Grid models can be used to compare decimals.

If the whole is divided into ten equal parts, each part represents 0.1.
If the whole is divided into one hundred equal parts, each part represents 0.01.

Example:

The model on the left is divided into 100 equal parts, and 46 are shaded.
So, it represents 0.46.

The model on the right is divided into 100 equal parts, and 73 are shaded.
So, it represents 0.73.

The model on the left has fewer parts shaded than the model on the right.

So, a comparison shown by the models is 0.46 < 0.73.

Decimals can be compared using models.

Number lines can be used to compare decimals.

If the tick marks on the number line separate the space between consecutive whole numbers into ten sections, each tick mark represents 0.1.

Example:

The tick marks separate the space between consecutive whole numbers into ten sections.
So, each tick mark on the number line represents 0.1.

The dot on the first number line is at 3.4.

The dot on the second number line is at 3.3.

The dot on the first number line is to the right of the dot on the second number line.
So, a comparison shown by the number lines is 3.4 > 3.3.

Compare & Order Decimals

Texas Essential Knowledge and Skills (TEKS): 4.2.F

compare and order decimals using concrete and visual models to the hundredths;

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