Section 1
Model Multiplying Two Decimals Less Than One
Property
To multiply two decimals less than one, you can use a 10x10 grid to model the area of a rectangle. The product of the two decimals is represented by the overlapping shaded area.
In this Grade 5 lesson from enVision Mathematics Chapter 4, students learn how to multiply a decimal by a decimal using hundredths grids, shading overlapping regions to find the product. The lesson covers key concepts such as why the product of two decimals less than 1 is smaller than either factor, and extends to multiplying decimals greater than 1 using double hundredths grids. Students practice equations like 0.3 × 0.5 and 0.6 × 1.2, building both conceptual understanding and computational fluency with decimal multiplication.
Section 1
Model Multiplying Two Decimals Less Than One
To multiply two decimals less than one, you can use a 10x10 grid to model the area of a rectangle. The product of the two decimals is represented by the overlapping shaded area.
Section 2
Interpret and Simplify Products from Models
When the overlapping area on a hundredths grid represents a multiple of 10 (e.g., 20, 50, 70 hundredths), the resulting decimal product can be simplified by removing the trailing zero. This is because groups of ten hundredths are equivalent to one tenth.
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Section 1
Model Multiplying Two Decimals Less Than One
To multiply two decimals less than one, you can use a 10x10 grid to model the area of a rectangle. The product of the two decimals is represented by the overlapping shaded area.
Section 2
Interpret and Simplify Products from Models
When the overlapping area on a hundredths grid represents a multiple of 10 (e.g., 20, 50, 70 hundredths), the resulting decimal product can be simplified by removing the trailing zero. This is because groups of ten hundredths are equivalent to one tenth.
Book overview
Jump across lessons in the current chapter without opening the full course modal.
Continue this chapter