การลบบนเส้นจำนวน แผ่นงาน

Model each problem by starting at the first number and moving left one space for every number being subtracted. Ask students to mark the starting point, count each backward jump aloud, and identify the landing number as the difference. Connect the jumps to an addition fact afterward so students see that subtraction and addition are inverse operations.

Begin with missing landing points and single-digit backward jumps. Then have students draw their own jumps, fill in missing numbers on partially labeled lines, and compare two subtraction paths that reach the same difference.

Students often start at the number being subtracted, move right instead of left, or count the starting point as the first jump. Have them circle the starting number and place a dot after each completed jump; this makes direction and jump count easy to check.

Use the worksheets as printable PDFs or host them as digital quizzes on Wayground, depending on whether students are working on paper or devices. Every worksheet includes a complete answer key. For paper assignments, teachers can scan or capture submissions and grade them with the Wayground for Teachers app.

Common Core develops subtraction from concrete and visual models toward flexible computation. Number lines connect counting backward and finding a difference to later work with unknowns, multi-digit subtraction, and interpreting distance between numbers.

Give learners who need support a worksheet with larger text and wider spacing, then limit practice to short backward jumps. More confident students can solve multi-step problems or explain two different jump sequences. In digital sessions, extended time can be assigned to individual students without changing the experience for the rest of the class.