การลบภายใน 20 แผ่นงานสำหรับ โรงเรียนอนุบาล

Keep subtraction concrete first. Let children remove counters from a group, cross out objects in a picture, and explain how many remain before showing the matching equation; numbers above 10 can be introduced gradually as students become secure with smaller quantities.

Try picture-based take-away problems, ten-frame activities, and simple stories such as, “There were 8 birds and 3 flew away.” These exercises connect the minus sign to an action children can understand.

Kindergartners may count the objects removed instead of those remaining, reverse the numbers in an equation, or treat the minus sign as a signal to add. Have them act out the problem and point to the starting amount, the amount taken away, and the amount left.

Use the printable PDF for hands-on paper practice or host the worksheet as a digital quiz on Wayground. Each worksheet has a complete answer key; paper submissions can also be captured and graded through the Wayground for Teachers app.

It can be appropriate when introduced developmentally, but kindergarten students usually begin with concrete subtraction situations and smaller numbers. Problems closer to 20 are best used after a child can reliably model what is being taken away and identify what remains.

Common Core emphasizes representing addition and subtraction with objects, fingers, drawings, actions, and equations. This work builds from decomposing small groups and prepares children to solve and eventually recall subtraction facts within 10 and then within 20.

Give those students more visual space by creating a version with larger text and wider spacing, and use Read Aloud during digital practice for children who cannot yet decode the directions independently. Extended time can also reduce pressure while they count or use manipulatives.