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This Subtracting Multiples Of 10 drill has 40 problems for Grade 1. Fathers Day theme. Answer key included.
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Max collected 80 gift balloons for Dad's party, but they're floating away! Subtract by tens to save them all!
Standard: CCSS.MATH.1.NBT.C.6
Preview
Page 1 — Drill
Page 2 — Answer Key
What's Included
About this Grade 1 Subtracting Multiples Of 10 Drill
Subtracting multiples of 10 is a cornerstone skill that helps first graders see numbers as groups rather than just individual ones. When children understand that 45 - 10 = 35, they're building mental math fluency and recognizing patterns in our base-10 system. This skill directly supports the ability to make change, count backwards, and solve two-digit problems later on. At ages 6-7, students are developing number sense—the gut feeling for how quantities relate to each other. Practicing these problems strengthens their confidence with place value, showing them that the tens place can shift independently from the ones. This foundation makes future subtraction strategies feel logical rather than magical, setting them up for success in second grade and beyond.
What your student will practice
- Subtract 10, 20, or 30 from two-digit numbers accurately
- Recognize that subtracting multiples of 10 only changes the tens digit
- Apply skip-counting and mental math strategies to solve subtraction problems
- Solve one-step word problems involving money or objects using subtraction of tens
Common mistakes to watch for
The most common error is when students subtract the tens digit from the ones digit instead of from the tens place—for example, writing 34 - 10 = 24 but saying "4 minus 1 equals 3." Another frequent mistake is losing track of the ones digit entirely and changing it by accident, turning 45 - 20 into 25 instead of 25. You'll spot this if a child's answer shows both digits shifting or if they count backwards by ones instead of by tens. Encourage them to cover the ones digit with a finger and focus only on the tens.
Create a simple "store" at home using toys, snacks, or household items priced in multiples of 10 cents or dollars (a toy car costs 30¢, a pencil costs 20¢). Give your child play money or coins and ask, "If you have 50¢ and buy something for 10¢, how much do you have left?" This makes the pattern visible and memorable because they're physically removing groups of 10, just like on the worksheet—and it's the kind of real math that happens at a store where Dad might take you shopping for Father's Day gifts.