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This Subtracting Multiples Of 10 drill has 40 problems for Grade 1. Soccer theme. Answer key included.
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Max must collect 90 scattered soccer balls before the big game starts in minutes!
Standard: CCSS.MATH.1.NBT.C.6
Subtracting multiples of 10 is a cornerstone skill that helps first graders see patterns in our number system and build confidence with bigger numbers. When children understand that 45 - 10 = 35, they're recognizing that only the tens place changes, not the ones. This foundation makes two-digit subtraction far less intimidating and helps them notice the structure hiding inside math. At six and seven years old, kids are developing number sense and beginning to see numbers as groups rather than isolated quantities. Mastering this skill boosts mental math speed and reduces the need for counting on fingers. It also prepares them for understanding regrouping later, which is essential for all future subtraction success.
The most common error is when children subtract from the ones place instead of the tens place—for example, saying 35 - 10 = 34 instead of 25. This usually means they're treating each digit separately without understanding place value. Watch for students who count back by ones instead of recognizing the tens-place shift, or who lose track and arrive at random answers. You'll also see children get confused when the ones digit is zero, like 40 - 10, sometimes incorrectly writing 30 as 3 or skipping the zero entirely.
Create a simple tens-frame poster at home using a paper divided into ten boxes. Place ten coins or small objects (like buttons or dried beans) in the frame, then remove one row of ten at a time while saying the subtraction aloud: 'We had forty, we took away ten, now we have thirty.' Do this with real items your child sees daily—soccer balls in a bag, crackers on a plate, or toys on a shelf. The physical act of removing ten items together, rather than counting one by one, locks in the pattern.