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This Subtracting Multiples Of 10 drill has 40 problems for Grade 2. Card Games theme. Answer key included.
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Max's card tower is collapsing! Subtract multiples of 10 fast to rebuild before it crashes completely down!
Standard: CCSS.MATH.2.NBT.B.5
Preview
Page 1 — Drill
Page 2 — Answer Key
What's Included
About this Grade 2 Subtracting Multiples Of 10 Drill
Subtracting multiples of 10 is a cornerstone skill that helps second graders build mental math fluency and number sense. When children can quickly solve problems like 45 - 10 or 78 - 30, they're developing the ability to manipulate tens and ones separately—a critical foundation for all future multi-digit math. This skill appears constantly in real life: calculating change at a store, figuring out how many minutes are left in a game, or even scoring points in card games where you subtract points in groups of ten. At ages 7-8, students' brains are ready to move beyond counting on fingers and start recognizing patterns in numbers. Mastering this concept boosts confidence and makes more complex subtraction feel manageable rather than overwhelming.
What your student will practice
- Subtract multiples of 10 from two-digit numbers fluently
- Recognize that subtracting tens doesn't change the ones place
- Apply mental math strategies without manipulatives
- Connect regrouping concepts to place value understanding
Common mistakes to watch for
Many second graders incorrectly subtract from both the tens and ones places when they see a subtraction problem. For example, with 34 - 20, they might compute 3 - 2 = 1 and 4 - 0 = 4, arriving at 14 instead of 14 (by coincidence correct here, but the reasoning is wrong). Watch for students who struggle when the ones digit in the problem is smaller, like 42 - 30, where they may try to regroup unnecessarily. The real red flag is when a child says 'I don't know' because they're still relying on counting rather than recognizing the ten-pattern.
Create a simple game at home: write two-digit numbers on index cards and have your child pick one, then you call out a multiple of 10 to subtract. They win a point for answering in three seconds or less. Start with easier numbers like 50, 60, 70 and move to 30, 40, 50 as confidence grows. This timed, game-like format mirrors how card games build quick mental recall and keeps the practice feel playful rather than drill-like for a 7 or 8-year-old.