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This Subtracting Multiples Of 10 drill has 40 problems for Grade 1. Gardening theme. Answer key included.
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Max discovered hungry beetles eating 70 vegetables! He must subtract groups of 10 to save the garden before sunset!
Standard: CCSS.MATH.1.NBT.C.6
Subtracting multiples of 10 is a foundational skill that helps first graders understand how our base-10 number system works. When children learn that 45 - 10 = 35, they're not just memorizing facts—they're discovering that the ones place stays the same while only the tens place changes. This insight makes larger subtraction problems feel manageable and builds confidence with two-digit numbers. Kids this age are naturally developing their ability to recognize patterns, and multiples of 10 are beautifully predictable. Mastering this skill also transfers to real-world situations, like counting out snacks or managing small toy collections. Strong tens and ones fluency prepares students for addition and subtraction strategies they'll use throughout elementary school.
The most common error at this age is treating subtraction of multiples of 10 the same as single-digit subtraction, causing students to count backward incorrectly or confuse which digit changes. You'll spot this when a child solves 37 - 10 and writes 27, then immediately doubts themselves because they counted on fingers. Another frequent mistake is students subtracting from the ones place instead of the tens place—for example, writing 36 - 10 = 26 then second-guessing and erasing. Watch for hesitation or finger-counting through tens; these signal the child hasn't yet grasped the pattern that only the tens digit moves.
Create a simple tens-and-ones visual using household items like beans or buttons separated into groups of 10 in a muffin tin. Ask your child, 'We have 5 groups of 10 beans plus 3 loose beans. If we take away 1 whole group of 10, how many groups are left?' This hands-on approach helps six-year-olds see that removing tens doesn't touch the ones—making the abstract pattern concrete and memorable before they solve problems on paper.