Mentally Subtracting 10 or 100 Worksheet – 2nd Grade Base 10 Practice

The Mentally Subtracting 10 or 100 Worksheet gives second grade students focused, no-prep practice with base 10. It is a print-and-go math page that fits easily into a mini-lesson, a center rotation, or a quick review day.

Learning objective: Students will review base 10, practice it in context, and show what they know in a way that is easy for the teacher to check.

Why it works: Students stay on task because the directions are short and the practice is the right size for one sitting. Teachers save time because the page is ready to print and easy to check.

What's included:

• 1 printable worksheet page

• Clear, student-friendly directions

• Answer key (1 page)

• Cover page

How it's organized: The page opens with these directions: "Use mental math to subtract. Write each answer in the box." Students then complete the practice items in order and check their work before turning it in.

Grade level: Designed for second grade students. It also works well for first grade and third grade students who need extra practice or a fresh review.

How to use it: Assign it after a mini-lesson, use it in a small group, send it home as homework, keep it in your sub folder, or use it as a quick formative check.

Answer key: An answer key is included, so you can check work quickly or let students self-correct.

Teaching tips and variations:

• Model the first item together, then let students finish the rest independently.

• Send it home as homework so families can see what their child is learning in math.

• Use it as an exit ticket the day after a base 10 lesson to see who needs more support.

Skills covered: Base 10, Subtraction, Math

Standards: Supports Common Core 2. NBT.A.1, 2. OA.B.2, 2. NBT.B.5.

File type: PDF, ready to print.

Number of pages: 3 (1 worksheet page, 1 answer key page, 1 cover page).

This printable is part of the Have Fun Teaching collection of math resources for elementary classrooms and homeschools. Visit our shop for more practice pages on related skills. Have Fun Teaching on Teach Simple