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Description:

This lesson is designed to hone students' arithmetic skills by introducing them to clock arithmetic and its applications in cryptography. The lesson provides links to discussions and activities related to arithmetic, clock arithmetic, and cryptography as well as suggested ways to integrate them into the lesson. Finally, this lesson provides links to follow-up lessons designed for use in succession with an introduction to clock arithmetic.

Subjects:

• Mathematics > General

Keywords:

Informal Education,Middle School,NSDL,NSDL_SetSpec_ncs-NSDL-COLLECTION-000-003-112-016,oai:nsdl.org:2200/20120614151538283T,High School,Vocational/Professional Development Education,High School Programming,Mathematics,Middle School Programming

English

Access Privileges:

Public - Available to anyone

Creative Commons Attribution Non-Commercial Share Alike

Collections:

None
Update Standards?

CCSS.Math.Content.3.OA.A.1: Common Core State Standards for Mathematics

Interpret products of whole numbers, e.g., interpret 5 × 7 as the total number of objects in 5 groups of 7 objects each.

CCSS.Math.Content.3.OA.A.3: Common Core State Standards for Mathematics

Use multiplication and division within 100 to solve word problems in situations involving equal groups, arrays, and measurement quantities, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.

CCSS.Math.Content.3.OA.B.5: Common Core State Standards for Mathematics

Apply properties of operations as strategies to multiply and divide.

CCSS.Math.Content.3.OA.C.7: Common Core State Standards for Mathematics

Fluently multiply and divide within 100, using strategies such as the relationship between multiplication and division (e.g., knowing that 8 × 5 = 40, one knows 40 ÷ 5 = 8) or properties of operations. By the end of Grade 3, know from memory all products of two one-digit numbers.

CCSS.Math.Content.HSA-CED.A.1: Common Core State Standards for Mathematics

Create equations and inequalities in one variable and use them to solve problems. Include equations arising from linear and quadratic functions, and simple rational and exponential functions.
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