Math Units Page

Lesson Purpose

Students will be able to apply their knowledge of addition and subtraction of rational numbers to complete a computerized check register so that they will be able to accurately maintain workplace financial documents. Not only will this help from a business standpoint, but this will also help them in their personal lives as they will be able to keep transaction records of their own accounts.

Related Documents

Lesson Objectives

By the end of this lesson students will be able to apply their knowledge of addition and subtraction of rational numbers to complete a computerized check register so that they will be able to accurately organize financial documents.

Student Target

I will be able to add and subtract both positive and negative numbers.

CCR Focus Standards

Number and Ratios - Level A

• 1.NBT.2

  Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:

  a. 10 can be thought of as a bundle of ten ones — called a “ten.”

  b. The numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight, or nine ones.

  c. The numbers 10, 20, 30, 40, 50, 60, 70, 80, 90 refer to one, two, three, four, five, six, seven, eight, or nine tens (and 0 ones).

Number and Ratios - Level D

• 7.NS.1

  Apply and extend previous understandings of addition and subtraction to add and subtract rational numbers; represent addition and subtraction on a horizontal or vertical number line diagram.

• 7.NS.1b

  Understand p + q as the number located a distance |q| from p, in the positive or negative direction depending on whether q is positive or negative. Show that a number and its opposite have a sum of 0 (are additive inverses). Interpret sums of rational numbers by describing real-world contexts.

Geometry - Level B

Number and Ratios - Level B

Supporting Standards

• 7.NS.1a

  Describe situations in which opposite quantities combine to make 0. For example, a hydrogen atom has 0 charge because its two constituents are oppositely charged.

• 7.NS.1c

  Understand subtraction of rational numbers as adding the additive inverse, p – q = p + (–q). Show that the distance between two rational numbers on the number line is the absolute value of their difference, and apply this principle in real-world contexts.
  

Standards for Mathematical Practice

• MP.1

  Make sense of problems and persevere in solving them. (MP.1)

• MP.6

  Attend to precision. (MP.6)

KYAE Employability Standards

• E.2

  E.2 Utilize workplace tools and technologies to communicate effectively (e.g., memos/e-mails, basic computer programs, phone systems).

• E.5

  E.5 Utilize resources responsibly.