In this Grade 4 Eureka Math lesson from Module 6: Decimal Fractions, students solve multi-step word problems involving money by adding and subtracting dollar and cent amounts expressed in unit form and decimal notation. Students apply strategies such as decomposing cents to make whole dollars and converting between cents and decimal form using the dollar symbol. The lesson builds on prior work with mixed unit addition and decimal fractions to develop fluency with real-world money calculations.
Section 1
Regrouping Dollars as Cents for Subtraction
When subtracting money, if the cents value in the top number (minuend) is less than the cents value in the bottom number (subtrahend), you must regroup. To do this, you convert 1 dollar into 100 cents.
Section 2
Modeling Two-Step Money Problems with Tape Diagrams
A tape diagram can model a multi-step problem where a total cost () is subtracted from an initial amount () to find the remaining amount or change (). First, find the total cost by adding individual items: . Then, find the change: .
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Section 1
Regrouping Dollars as Cents for Subtraction
When subtracting money, if the cents value in the top number (minuend) is less than the cents value in the bottom number (subtrahend), you must regroup. To do this, you convert 1 dollar into 100 cents.
Section 2
Modeling Two-Step Money Problems with Tape Diagrams
A tape diagram can model a multi-step problem where a total cost () is subtracted from an initial amount () to find the remaining amount or change (). First, find the total cost by adding individual items: . Then, find the change: .
Book overview
Jump across lessons in the current chapter without opening the full course modal.
Continue this chapter