Decimals Using Base 10 Blocks and Money

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Last week, I shared an activity that you can use when introducing fractions with denominators 10 & 100. Click here to read that blog post. It includes a freebie for your guided math groups!

Today’s blog post includes a math mat that will helps students represent decimals in various ways. In fourth grade, students are expected to “use decimal notation for fractions with denominators 10 or 100.”

Use Base 10 Blocks to Represent Decimals

In the example below, students use base 10 blocks to build five-tenths. The flat represents 1 whole. Each rod represents 1/10 of the whole, so you need five of them to build 5/10.

The second picture shows how to model 1.25 using the base ten blocks. Again, this is a great way to show decimals in expanded form.

Representing Decimals Free Resource for Fourth or Fifth grade teachers Representing Decimals Free Resource for Fourth or Fifth grade teachers

Use Money to Represent Decimals

In the following examples, student use money to represent decimals. Dimes represents 1/10 of a whole, because you need ten dimes to equal $1.00 (one whole). Pennies are used to represent hundredths, because you need 100 pennies to equal one whole or one dollar.

Using money to represent decimals. Free decimals lesson for guided math groups 4th or 5th grade. Using money to represent decimals. Free decimals lesson for guided math groups 4th or 5th grade.

Need resources for your math centers? 

 

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Mrs. Santillana

Mrs. Santillana

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