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This Adding Multiples Of 10 drill has 40 problems for Grade 2. Tractors theme. Answer key included.
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Max's tractors are running out of fuel! He must add fuel amounts by tens to get all machines back to the barn before sunset.
Standard: CCSS.MATH.2.NBT.B.5
Preview
Page 1 — Drill
Page 2 — Answer Key
What's Included
About this Grade 2 Adding Multiples Of 10 Drill
Adding multiples of 10 is a cornerstone skill that helps second graders work with place value and build mental math fluency. When children can quickly add numbers like 23 + 10 or 45 + 30, they're developing a deep understanding of how our number system works—recognizing that 10 ones equals 1 ten. This skill appears everywhere in daily life, from counting coins in a piggy bank to calculating scores in games. At ages 7–8, students are developmentally ready to see patterns and shortcuts rather than always counting by ones, which makes adding multiples of 10 feel like solving a puzzle instead of tedious arithmetic. Mastering this concept also builds confidence for subtraction with multiples of 10 and lays groundwork for two-digit addition and subtraction throughout the year.
What your student will practice
- Recognize that adding multiples of 10 only changes the tens digit
- Solve addition problems with multiples of 10 using mental math strategies
- Apply adding-multiples-of-10 to real-world scenarios with two-digit numbers
- Explain why the ones place stays the same when adding 10, 20, or 30
Common mistakes to watch for
Many second graders mistakenly add the entire number without recognizing the pattern—so they'll solve 34 + 20 by counting up 20 ones rather than moving two tens. Another frequent error is misaligning numbers mentally and changing the ones digit by accident (writing 34 + 20 = 55 instead of 54). Watch for students who recount from 1 every time instead of using the shortcut of moving up by tens. You can spot this by observing whether they use their fingers or mentally skip-count versus instantly recognizing that only the tens place changes.
Play a simple 'tens game' at home during routine moments like snack time or a short car ride. Say a two-digit number aloud (like 'twenty-three'), then ask your child what it becomes when you add ten more. Repeat with numbers like 31, 45, or 52. Make it playful—you could pretend you're a farmer adding groups of ten tractors to a field, and your child figures out the new total. This repeated, low-pressure practice helps the pattern stick faster than worksheets alone and makes math feel like a fun conversation rather than a test.