Grade 1 Addition Worksheet: Find the Missing Number in Whole Tens

Teaching the addition of whole tens can be made easy and engaging with simple strategies. This concept is crucial for building a strong foundation in 2-digit addition and understanding place value.

• Visual Cues: Use objects like bundles of ten sticks, LEGO blocks, or even fingers to represent tens (e.g., three bundles for 30).
• Count in Tens: Practice counting aloud by tens (10, 20, 30, 40...) to build fluency.
• Relate to Money: Use ten-rupee notes to make the concept of adding whole tens more practical and relatable for kids.

There are several simple strategies that a Grade 1 student can use to find the missing number in an addition problem. These methods help improve number sense and mental maths.

1. Count Up: Start with the known addend and count up to the total. For 20 + ___ = 50, start at 20 and count by tens: 30, 40, 50. You counted three times, so the answer is 30.
2. Use Subtraction: Understand that addition and subtraction are opposites. To find the missing number, subtract the known addend from the total (e.g., 50 - 20 = 30).
3. Use Number Bonds: If a child knows that 2 and 3 make 5, they can apply this to tens: 20 and 30 make 50.

Yes, this page provides a free printable worksheet for missing addends specifically designed for Class 1 students. You can easily download the high-quality PDF for practice at home or in the classroom. This practice addition worksheet helps children master adding two-digit whole tens.

This worksheet makes maths practice fun and engaging for young learners through its thoughtful design. It avoids overwhelming students and encourages participation.

• Large, Clear Fonts: Easy-to-read numbers help children focus on the sums.
• Visual Cues: It includes addition with pictures (like blocks) to help students visualise the problem.
• Uncluttered Layout: A simple and clean design prevents distraction and builds confidence.

You can easily use this worksheet to support your child's learning at home for extra practice or homework. Simply download the free printable maths worksheet PDF, print it out, and let your child use a pencil to fill in the missing number for each addition problem.

Learning to add whole tens (like 20 + 40) is a critical milestone for Grade 1 students. It forms the bedrock for more advanced maths skills and is a key part of the NCERT and CBSE maths curriculum.

• It strengthens the understanding of place value (the concept of tens and ones).
• It builds a strong foundation for learning 2-digit addition with regrouping.
• It significantly improves mental maths speed and accuracy.

Yes, the downloadable addition sum PDF comes with a complete answer key. This allows parents and teachers to quickly check the answers for all the missing addend problems, making it easy to review the work with the student and provide helpful feedback.

This worksheet helps develop several crucial early mathematical skills beyond basic addition. By solving these problems, your child builds:

• Number Sense: A better intuition for numbers and their relationships.
• Logical Reasoning: The ability to think backward from a total to find a missing part.
• Algebraic Thinking: An early introduction to solving for an unknown in an equation.
• Addition Fluency: Increased speed and confidence in solving 2-digit addition sums.

Yes, this addition problems for class 1 worksheet is fully aligned with the learning objectives of the CBSE and NCERT syllabus. It directly addresses key topics such as addition, place value, and solving for missing numbers in simple equations, making it an excellent resource for concept reinforcement.