---
title: Adding 3 Numbers (to 100)
created: '2026-05-26'
updated: '2026-05-26'
type: lesson_topic
subject: math
tags:
- math
- grade-2
- homeschool
- ccss
standard: 2.NBT.A, 2.NBT.B, 2.OA.A
phase: 2
phase_name: "Addition & Subtraction to 100 (Weeks 7\u201314)"
weeks:
- 12
source: ''
---

# Adding 3 Numbers (to 100)

Second grade math topic covering adding 3 numbers (to 100). Part of Phase 2 (Addition & Subtraction to 100 (Weeks 7–14)).

## Key Concepts
Commutative property,  grouping friendly numbers

## Standards
2.NBT.A, 2.NBT.B, 2.OA.A

## Prerequisites
[[place-value-tens-ones]], [[comparing-ordering-numbers]], [[addition-facts-to-20]], [[subtraction-facts-to-20]], [[phase-1-review-assessment]]

## Related Topics
[[adding-within-100-no-regrouping]], [[subtracting-within-100-no-regrouping]], [[addition-with-regrouping]], [[subtraction-with-regrouping]], [[mixed-2-digit-addition-subtraction]]

---
*Generated from curriculum data*  ^[[raw/curriculum/math]]