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This Subtracting Multiples Of 10 drill has 40 problems for Grade 2. Animation theme. Answer key included.
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Max discovered 80 animated friends trapped in the magic studio—he must subtract by tens to unlock each door before midnight!
Standard: CCSS.MATH.2.NBT.B.5
Subtracting multiples of 10 is a cornerstone skill that helps second graders move beyond counting on their fingers and toward flexible mental math. When children master problems like 45 - 10 or 73 - 20, they're building the foundation for two-digit subtraction and understanding how place value actually works in real calculations. At ages 7-8, students are developing the abstract thinking needed to see that subtracting 10 means removing one entire group of ten—the ones digit stays the same, only the tens place changes. This skill shows up constantly in everyday life: counting down allowance after spending money, tracking points in games, or measuring ingredients. Students who can subtract multiples of 10 quickly gain confidence with larger numbers and develop strategies they'll use for years. This worksheet drills the pattern recognition and automaticity that make all future subtraction easier and faster.
The most common error is students treating the ones digit as if it should change during subtraction. For example, a child might compute 34 - 10 as 24 instead of 24, or worse, 23. Watch for students who count backward by ones instead of recognizing the tens pattern—they'll answer slowly and make careless mistakes even on simple problems. Another red flag is when a student subtracts from both digits, such as doing 34 - 20 and getting 12 by subtracting 2 from both the 3 and the 4. If your child is struggling with these patterns, ask them to circle or point to just the tens digit to refocus their attention.
Create a quick game using a deck of cards or number cards at home: write two-digit numbers (30-99) on one set and multiples of 10 on another (10, 20, 30, 40, 50). Have your child draw one from each pile and subtract aloud, then check the answer together. Make it playful by timing how many they can do in one minute, like characters in an animation racing against the clock. This mimics the drill format while keeping it interactive and giving immediate feedback in a low-pressure setting where mistakes feel like part of the game, not failure.