การลบเศษส่วนที่มีตัวส่วนเท่ากัน แผ่นงานสำหรับ ชั้นประถมศึกษาปีที่ 3

Begin with a concrete story: “Seven eighths of a strip is shaded, and three eighths is removed.” Have students cross out three equal parts, count the four remaining parts, and then connect the model to 7/8 − 3/8 = 4/8.

Use fraction strips, shaded-area problems, and number-line jumps before moving to equations. Keep the denominators the same so students can focus on subtracting the number of equal parts rather than changing the size of the parts.

They may treat a fraction as two separate whole numbers. Return to a visual model and ask what the denominator describes; if the pieces remain eighths, the denominator must remain 8.

The worksheets are available as printable PDFs and digital formats, so teachers can assign paper practice or host the same skill as a Wayground digital quiz. Every worksheet includes an answer key; teachers using paper can also capture submissions and grade them with the Wayground for Teachers app.

Common Core Grade 3 centers on understanding fractions as numbers, comparing them, and recognizing equivalent fractions. Simple like-denominator subtraction can extend that foundation by having students remove equal-sized parts, preparing them for formal fraction addition and subtraction in later grades.

Keep a visual model beside each equation and reduce the number of problems on the page. A large-font or wide-spaced worksheet can make models easier to track, while Read Aloud can support students who understand the math but struggle to decode word problems.

Students build the necessary fraction concepts in Grade 3, including equal parts, number-line placement, and equivalence. Formal work with adding and subtracting fractions typically expands in later grades, so Grade 3 practice should stay visual and concept-focused.