What addition skills should Grade 4 students master?

Grade 4 students should master mental addition with 2-digit numbers, including problems with and without carrying, adding multiple addends, and developing fluency with mental math strategies. They should be able to add 2-digit numbers efficiently and solve problems like 23 + 24, 46 + 89, and 5 + 40 + 55. According to the Common Core State Standards , fourth graders should fluently add multi-digit whole numbers using the standard algorithm.

How can I help my child learn mental addition with 2-digit numbers?

Start by breaking numbers apart using place value. For example, 23 + 24 can be thought of as (20 + 3) + (20 + 4) = 40 + 7 = 47. Use number lines to visualize addition. Practice with problems that don't require carrying first, then move to problems that do. Resources from NCTM suggest that mental math strategies help students develop number sense and computational fluency.

What are the best strategies for teaching 2-digit mental addition?

Teach students to break numbers apart by place value (23 = 20 + 3), add tens first, then ones, and combine. For problems with carrying, show how to regroup (e.g., 46 + 89: 40 + 80 = 120, 6 + 9 = 15, so 120 + 15 = 135). Use number lines, hundred charts, and visual models. Encourage mental math once students understand the concept. Education experts recommend building from concrete to abstract representations.

How do I teach adding multiple addends mentally?

Start with problems like 5 + 40 + 55. Teach students to look for friendly numbers (5 + 55 = 60) and add those first, then add the remaining number (60 + 40 = 100). Use the commutative and associative properties to rearrange numbers for easier mental calculation. Practice with different combinations to build flexibility in thinking.

Grade 4 Addition: Strategies, Worksheets & Activities

Master mental addition with 2-digit numbers using proven strategies, free printable worksheets, and engaging activities. Help your fourth grader build fluency with mental math and computational skills.

Grade 4 Addition Worksheets

These math worksheets help fourth graders practice mental addition with 2-digit numbers, including problems with and without carrying, and adding multiple addends. Build fluency and confidence with mental math strategies.