Add and subtract tens
Add and subtract tens
What you'll learn
- Identify the tens place in a two-digit number with 80% accuracy.
- Solve addition problems involving tens (e.g., 20 + 30) with 70% accuracy using manipulatives or drawings.
- Solve subtraction problems involving tens (e.g., 50 - 20) with 70% accuracy using manipulatives or drawings.
- Explain, using pictures or words, how adding or subtracting tens changes the number by that many groups of ten.
Tutorial Preview
Adding groups of ten: 20 + 30
Subtracting groups of ten: 50 - 20
Adding tens to a number: 24 + 30
Sample Practice Questions
Want to practice and check your answers?
Sign up to access all questions with instant feedback, explanations, and progress tracking.
Start Practicing FreeMore from Mixed Operations
Mathematics for other grades
Frequently asked questions
What grade level is "Add and subtract tens"?
Add and subtract tens is a Grade 1 Mathematics lesson on ExcelOS.
What will I learn in Add and subtract tens?
You'll be able to: Identify the tens place in a two-digit number with 80% accuracy; Solve addition problems involving tens (e.g., 20 + 30) with 70% accuracy using manipulatives or drawings; Solve subtraction problems involving tens (e.g., 50 - 20)….
Is "Add and subtract tens" free to practice?
Yes. You can read the tutorial preview for free, and signing up for a free ExcelOS account unlocks the full tutorial and all practice questions with instant feedback.
How many practice questions are included with Add and subtract tens?
This lesson includes 28 practice questions across multiple difficulty levels, each with instant feedback and explanations.