ACE 2.1 Introduction to Addition of Integers

LARGE GROUP
Today we worked on Problem 2.1, Introducing Addition of Integers, coming up with algorithms (step-by-step plans) to add positive and negative numbers. Class notes can be downloaded for group 7A and group 7B.

LARGE GROUP HW:
ACE 2.1 Homework
Please choose one of the options below to complete.

Option 1
Problems 1-3 and 30a, b, e, g, i on pages 32-37

Option 2
Problems 1-3 and 37 on pages 32-39

Due tomorrow, Tuesday, March 16.

POW: Rate Problems due Monday, March 22.

SMALL GROUPS
Today MaryBeth worked with both small groups to review the integer and opposite numbers cards. Then students learned the chip model for positive and negative numbers, and looked at the idea of opposites using chips (cancelling). Students represented single integers using different combinations of chips, and solve addition and subtraction problems using chips.

Then students worked on Problem 1.4, In the Chips.

SMALL GROUP HW:
Finish Problem 1.4
To do tonight's HW you can use two different colored chips if you happen to have those at home, or even two different coins (nickels and pennies for example.) Just be sure to be clear about which represents positive integers and which represents negative integers. You can also draw the chip representations with red and green (or black) markers.

For problem E, please just use the chip method to solve the problems. You may draw your solutions, but you do not need to write the solution out in words!

Due tomorrow, Tuesday, March 16.