Content Area: Math

 

Index: 4.1B Grade 4 CPI 9

 

Standard: 4.1 - Number and Numerical Operations

 

Strand: B - Numerical Operations

 

Cumulative Progress Indicator: 9 -   The student will use concrete models to explore addition and subtraction with fractions.

 

Grade: 4

 

Sample Activities:

 

·        Students use fraction circle pieces (each unit fraction a different color) to begin to explore addition of fractions. Questions like: Which of these sums are greater than 1? and How do you know? are frequent.

 

·        Students use the base ten models that they are most familiar with for whole numbers and relabel the components with decimal values. Base ten blocks represent 1 whole, 1 tenth, 1 hundredth, and 1 thousandth. Coins, which had represented a whole number of cents, now represent hundredths of dollars.

 

·        Students operate a school store with school supplies available for sale. Other students, using play money, decide on purchases, pay for them, receive and check on the amount of change.

 

·        In groups, students each roll a number cube and use dimes to represent the decimal rolled. For example, a student rolling a 4 would take 4 dimes to represent 4 tenths of a dollar. When a student gets 10 dimes, he turns them in for a dollar. The first student to get $5 wins the game.

 

·        Students use money to represent fractions. For example, a quarter and a quarter equals half a dollar.

 

·        Students demonstrate equivalent fractions using pattern blocks. For example, if a yellow hexagon is one whole, then three green triangles (3/6) is the same size as one red trapezoid (1/2). Pattern blocks may also be used to represent addition and subtraction of fractions.