Printable Two-Digit Addition Worksheet | Grade 1 Math

This Grade 1 printable addition worksheet builds two-digit addition fluency through a Halloween-themed pumpkin race game, giving students structured practice adding one- and two-digit numbers with base-ten blocks and a place value chart as scaffolds.

At a Glance

• Grade: 1 · Subject: Math
• Standard: CCSS.MATH.CONTENT.1.NBT.C.4 — Add two-digit numbers using place value strategies and properties
• Skill Focus: Two-digit addition with base-ten blocks and place value chart
• Format: 1 page · 10 problems · Answer key included · PDF
• Best For: Guided or independent math center practice
• Time: 15–25 minutes

Inside: 10 addition problems mixing one- and two-digit numbers, all framed around a Halloween pumpkin race game scenario. Students use an embedded base-ten block visual and place value chart to record tens and ones before writing each sum. Answer key mirrors the student page for fast teacher review.

• Guided practice (problems 1–3): Worked example with labeled base-ten blocks shows regrouping steps. High scaffold — students trace the model before writing digits.
• Supported practice (problems 4–7): Blank base-ten frames provided; students draw blocks independently, then record tens and ones. Moderate scaffold.
• Independent practice (problems 8–10): Place value chart only — no block frames. Students choose their own strategy to find each sum. Minimal scaffold.

Structure follows a gradual-release sequence (I Do, We Do, You Do), moving students from concrete representation toward abstract computation across the three problem sets.

CCSS.MATH.CONTENT.1.NBT.C.4 — Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10, using concrete models or drawings and strategies based on place value, properties of operations, and the relationship between addition and subtraction. Supporting standard CCSS.MATH.CONTENT.1.NBT.B.2 (understanding tens and ones) underpins the base-ten block scaffold used throughout. Both standard codes can be copied directly into lesson plans, IEP goals, or district curriculum mapping tools.

Use before direct instruction as a diagnostic: observe which students draw base-ten blocks accurately versus those who count on fingers, signaling place value gaps. Use after instruction as a formative check — collect completed charts to identify students still confusing tens and ones columns. Pairs with the Halloween Place Value Race lesson plan for a full 45-minute block. Completion time: 15–25 minutes for most Grade 1 students.

Designed for Grade 1 students building early place value fluency. Works for on-level learners and, with teacher modeling, for students needing concrete-to-representational support. Pairs naturally with a tens-and-ones anchor chart or linking-cube manipulatives for students who need additional hands-on reinforcement before moving to pictorial models.

This worksheet targets CCSS.MATH.CONTENT.1.NBT.C.4, requiring Grade 1 students to add one- and two-digit numbers using place value strategies and concrete models. Research supports structured worksheet practice with visual scaffolds: Fisher & Frey (2014) identify the gradual-release framework — modeled, guided, and independent practice — as a high-leverage structure for building procedural fluency in early numeracy. The base-ten block scaffold embedded here aligns directly with that model, moving students from concrete representation to abstract computation across 10 problems. Teachers can use completed place value charts as formative evidence of standard mastery, making this resource suitable for progress monitoring, math center rotation, or whole-class instruction during seasonal thematic units.