Adding whole tens (3 addends with missing number)

Start by reviewing the concept of regrouping with base ten blocks or a quick drawing of tens and ones before diving into the worksheet. Encourage your child to always add the ones column first, then the tens. When regrouping is needed, remind them to write the carried digit above the tens column so they do not forget it. Mix in a few mental math warm-ups, like "What is 24 plus 10?", to build number sense alongside written practice.

These two-digit addition worksheets for 2nd grade give students the targeted practice they need to master adding numbers up to 99. Students work through problems with and without regrouping, building fluency with the standard addition algorithm alongside place value understanding. Our 2-digit addition worksheets include a range of formats, from vertical column addition to word problems, so your child sees the concept from every angle. Two-digit addition is a cornerstone of 2nd grade math and the launchpad for multi-digit computation in later grades.

This worksheet is designed for 2nd Grade students (Ages 7-8), aligned to Common Core standard 2.NBT.6. It can also be used as review for early students at the next grade level or as an introduction for advanced students.

Yes. This worksheet works for homeschool, classroom, and tutoring settings. Print individual pages for targeted practice, or print the full set as a packet. Works great as a morning warm-up, independent center activity, or fast-finisher task.

Second graders should fluently add within 20 (CCSS 2.OA.B.2) and add within 100 using strategies based on place value and properties of operations (2.NBT.B.5). They also begin adding within 1,000 using models and drawings (2.NBT.B.7).

Regrouping (carrying) is typically introduced mid-year in second grade when students add two-digit numbers that sum to more than 9 in the ones place. Understanding place value is a prerequisite. Use base-ten block worksheets before transitioning to the standard algorithm.

By the end of second grade, students should know all addition facts within 20 from memory (CCSS 2.OA.B.2). That is 100 facts (0+0 through 9+9, plus the commutative pairs). Daily timed practice with addition fact worksheets helps build automaticity.