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#### Description:

This is a task from the Illustrative Mathematics website that is one part of a complete illustration of the standard to which it is aligned. Each task has at least one solution and some commentary that addresses important asects of the task and its potential use. Here are the first few lines of the commentary for this task: Materials * Unifix cubes * Large blocks in different sizes or varying lengths of sentence strips Note: The large blocks or the cut-up lengths of senten...

#### Subjects:

• Mathematics > General
• Education > General

• Grade 1
• Grade 2
• Grade 3
• Grade 4
• Grade 6
• Grade 8
• Grade 9
• Grade 10

#### Keywords:

Informal Education,Early Elementary,Grade 1,NSDL,NSDL_SetSpec_ncs-NSDL-COLLECTION-000-003-112-103,oai:nsdl.org:2200/20140412195448232T,Elementary School,Mathematics,Education,Vocational/Professional Development Education

English

#### Access Privileges:

Public - Available to anyone

#### License Deed:

Creative Commons Attribution Non-Commercial Share Alike

#### Collections:

None
Update Standards?

#### CCSS.Math.Content.1.OA.A.1: Common Core State Standards for Mathematics

Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

#### CCSS.Math.Content.1.MD.A.2: Common Core State Standards for Mathematics

Express the length of an object as a whole number of length units, by laying multiple copies of a shorter object (the length unit) end to end; understand that the length measurement of an object is the number of same-size length units that span it with no gaps or overlaps.
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