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This Addition drill has 40 problems for Grade 2. Ants theme. Answer key included.
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Max discovered the queen ant's eggs scattered everywhere! He must quickly reunite them before the colony discovers they're missing.
Standard: CCSS.MATH.2.NBT.B.5
Preview
Page 1 — Drill
Page 2 — Answer Key
What's Included
About this Grade 2 Addition Drill
Addition is the foundation of mathematical thinking for seven- and eight-year-olds, moving them beyond counting on fingers toward true number sense. At this age, students are developing fluency with sums up to 20, which opens doors to everyday problem-solving—sharing snacks at lunch, combining toys, or figuring out how many crayons two classmates have together. This worksheet targets the specific Grade 2 skill of adding two-digit numbers within 100, building mental math strategies like composing tens and understanding place value. When children master these addition patterns now, they develop confidence and the mental flexibility needed for subtraction, word problems, and later multiplication. Strong addition skills also strengthen working memory and logical reasoning, cognitive abilities essential at this developmental stage.
What your student will practice
- Add two-digit numbers using place value strategies
- Fluently add within 20 and recognize patterns
- Decompose numbers to make tens and add efficiently
- Apply addition strategies to solve simple word situations
Common mistakes to watch for
Second graders often forget to regroup or 'carry' when ones add up to 10 or more—for example, solving 17 + 5 as 12 instead of 22 by ignoring the regrouped ten. Another frequent error is reversing digits after regrouping, writing 32 instead of 23. Watch for students who still rely entirely on counting on their fingers rather than using ten-frames or mental math. If a child hesitates with sums like 9 + 8 or struggles with any addition involving a teen number, they may need practice with making-ten strategies before moving forward.
Play a simple addition game at home during everyday moments—when setting the table, ask 'We have 8 forks and need 7 more, how many total?' or while snacking, 'You ate 6 crackers and I ate 5, how many did we eat?' Start with sums under 15 where your child feels confident, then gradually increase. This real-world context helps them see addition as a tool, not just worksheet problems, and builds mental flexibility much faster than drill alone.