All practice problems from the unit. Unit: 1.5 Adding Within 100 (Grade 1). 1.5 Adding Within 100 Unit Goals Students use place value understanding and properties of operations to add within 100. Section A Goals Add within 100 without composing a ten. Use equations to represent addition methods. Section B Goals Add a one-digit and a two-digit number within 100 with composing a ten. Use equations to represent addition methods. Section C Goals Add 2 two-digit numbers within 100, with composing a ten. Use equations to represent addition methods. Read More Lessons Resources Assessments Practice Glossary Lessons Section A: Add Without Making a Ten 1 Add Tens or Ones 2 How