# Lesson: Add Integers Using Chips/Counters

11400 Views
17 Favorites

### Lesson Plan

Standard

6NSO.C9

Know integer subtraction is the inverse of integer addition; use the number line to model addition and subtraction of integers and add and subtract integers

Aim/Objective:

Key Points

·         Positive counters are represented by a empty circle

·         Negative integers are represented by a colored circle

·         One positive and one negative equal zero (cancel out each other)

Assessment:

1.      Chip used counters and a mat to keep track of his score in a word game.  He got 6 questions correct and 12 questions incorrect.

What is Chip’s final score?

A.      –18

B.      –12

C.      –6

D.     12

2.      Draw a diagram to show 8 + (-5).   Then solve the problem.

3.       Draw a diagram to show -9 + 4.  Then solve the problem.

Lesson

Do Now:

 1)      -5 + 8 2)      7 + (-3) 3)      -8 + -7

Teaching Points/Direct Instruction:

·         Tell students that another way to model addition of integers is to use counters

·         Show students that the light colored (empty) circle/counter represents a positive  and a dark colored counter/circle represents a negative

·         Show students that when adding integers we can use the counters by just putting out what the problem says and then removing the parts that cancel each other out

·         Tell students that one positive and one negative together equal zero and in other words they cancel out each other

·         Once you have done all of your canceling then you can see what’s remaining.

·         If positive colors are remaining you just name how many and there are, if negatives are remaining you just name how many their area and add a negative sign

·         Demonstrate -5 + 8 for students

·         Draw a model and show how to write a number sentence for it.  (-3 + 2 = -1)

Guided Practice:

·         Students work with two color counters to model and draw -4 + 4

·         -8 + -2

·         +1 + (-8)

Independent Practice:

·         Students work on worksheet to practice using counters and writing number sentences for models of addition with integers.

Closing:

·         Ask students to explain to one another how to use counters to model integer addition

·         Exit Ticket

·

Accommodations

Small Group Practice with RF

skills time

·  Shuffle both decks.

·  Now it’s time to “face-off”. Player 1 should lay down the top 2 cards from his deck face up. Player 1 adds the 2 cards, paying attention to positive and negative signs. Player 2 should do the same with her 2 cards. Compare answers. The player with the highest answer keeps all 4 cards (place in a separate pile).

·  Continue playing until all integer cards are used. The player with the most cards wins!

Pull students to review Unit 1 Test mistakes.

### Lesson Resources

 Notes Add Integers with Chips and Counters   Notes 4,666 Notes 4 Number Line Counters 1,530 Notes 4 Number Line Counters 871 Exit Ticket Add Integers Counters 1,771 HW Add Integers with Counters 2,403