Grade 1Mathhard
Advanced Subtraction
Advanced Subtraction — Subtraction worksheet for Grade 1.
Download Free PDF
No signup required — instant download
mathsubtractionG1hard
Worksheet Preview
What Your Child Will Learn
- Solve two-digit subtraction problems with regrouping (borrowing) when the ones place of the minuend is smaller than the ones place of the subtrahend
- Apply mental math strategies to subtract from numbers up to 20, including decomposing numbers and counting backwards
- Demonstrate understanding of subtraction as 'taking away' and 'comparing' by accurately solving word problems with higher-order reasoning
How to Use This Worksheet
- Step 1: Begin with a quick warm-up where your student solves 2-3 simple subtraction problems without regrouping (e.g., 8 - 2, 9 - 4) to activate prior knowledge and build confidence.
- Step 2: Work through one problem together that requires regrouping. Model the process aloud: 'I have 12. I need to take away 7. I can't take 7 from 2, so I break apart the 1 ten into 10 ones. Now I have 12 ones. 12 ones - 7 ones = 5 ones.' Use drawings or manipulatives alongside the written problem.
- Step 3: Have your student solve the next 2-3 problems with you observing and providing guidance only when they get stuck. Praise their effort and correct any regrouping errors immediately with visual tools.
- Step 4: Allow independent practice on the remaining 5-6 problems. Circulate or check in frequently. If errors occur, pause and reteach the regrouping process rather than continuing.
- Step 5: Review all 10 problems together at the end. Have your student explain their reasoning for one regrouping problem aloud ('Tell me how you solved this one'). This verbal explanation reveals whether they truly understand the concept or are just following memorized steps.
Tips for Parents & Teachers
Many Grade 1 students struggle with regrouping because they haven't fully internalized place value. Use physical manipulatives like base-ten blocks or bundled straws to show how 1 ten can be 'broken apart' into 10 ones before subtracting. Work through one regrouping example together before having them attempt problems independently.
Watch for the common mistake of subtracting the smaller number from the larger number in the ones place, rather than recognizing when borrowing is needed. Explicitly teach the 'check' step: have students verify their answer makes sense by adding it back to the subtrahend (e.g., 12 - 5 = 7, then 7 + 5 should equal 12).
Advanced Grade 1 students at this difficulty level are ready to transition from counting-on strategies to efficient mental math. Encourage 'bridge to ten' strategies (e.g., 15 - 8 = 15 - 5 - 3) rather than counting backwards on fingers, which will prepare them for Grade 2 multi-digit subtraction.
Frequently Asked Questions
My Grade 1 student can add with regrouping but struggles with subtraction regrouping. Why is subtraction harder?
Subtraction with regrouping requires students to think about place value in a more abstract way than addition. In addition, they 'make a ten.' In subtraction with regrouping, they must 'break apart a ten,' which involves reversing their thinking. This is developmentally harder. Support this by always using visual manipulatives (base-ten blocks, drawings) and explicitly connecting the concrete action (breaking apart a bundle of 10) to the written steps (crossing out the 1 ten and writing 10 ones). Expect this to take several weeks of practice.
Should my student be solving subtraction problems with numbers larger than 20 at this level?
For hard-difficulty Grade 1, focusing on two-digit subtraction with regrouping up to 20 is appropriate and rigorous. If your student masters this (solving accurately and explaining their thinking), you might extend to 25-30, but don't rush beyond this range. Grade 1 mastery means building strong conceptual understanding, not just procedural speed. Quality over quantity.
What should I do if my student keeps reverting to counting on their fingers instead of using mental math strategies?
Finger counting is a valid strategy for Grade 1, but for 'hard' difficulty subtraction, you want to shift toward more efficient mental strategies. Gently redirect: 'Let's try without fingers today. Let's use a number line' or 'Let's use tens and ones blocks to see the answer faster.' Model the faster strategy first, then practice it together. Gradually reduce finger-counting opportunities during guided practice, but don't shame it—acknowledge it was helpful when they were learning, and now they're ready for the next level.
How can I tell if my student truly understands subtraction or is just memorizing facts?
Related Worksheets
More Math Worksheets
Related Articles
Second Grade Math Skills: What Your Child Should Know (Parent Guide)
A complete guide to second grade math milestones. Learn what math skills your child should master, how to practice at home, and get free printable worksheets for every key topic.
First Grade Math Word Problems: Strategies, Tips, and Free Worksheets
Help your first grader master math word problems with proven strategies, step-by-step approaches, and free printable worksheets. A complete parent's guide to building problem-solving skills.
First Grade Addition and Subtraction: Proven Strategies to Build Math Confidence
Master effective strategies to teach addition and subtraction to first graders — from counting on and number lines to hands-on activities and free printable worksheets.
Get Free Worksheets in Your Inbox
Subscribe for new worksheets and homeschool tips. No spam, unsubscribe anytime.