[12-10-16A-T7]
Product of integers

The ideas

For today, I am asking you to accept several ideas without discussion about why they are correct. I would like you to practice using those ideas today. Tomorrow we will talk about their meaning and why they are true.

Those ideas are the following.

[1] 	The product of positive numbers is a positive number. For example, (6) (5) = 30.

[2] 	The product of two negative numbers is a positive number. For example, (-7) (-3) = 21.

[3] 	The product of a negative number and a positive number is a negative number. 
	For example, (-5) (4) = -20 and (8) (-5) = -40.

Using these ideas

Practice using these ideas by working the problems on the problem set you receive along with this. It is named "12-10-16-T7".

Use the order of operations you learned in previous grades. 

7B students. You do not have to use the idea of distribution that we talked about yesterday.

Examples:

[EX1]	5·(-3) = -15

I know using both the dot and parenthesis in the same expression may look redundant to you. But it  makes complicated expressions easier to read and it is perfectly fine notation.

[EX2]	(-6)·(-3) = 18

[EX3]	\(TraditionalForm\`\((\(-6\))\)·\((\(-3\))\)·\((\(-5\))\)\)
=18·(-5)
=-90

[EX4]	\(TraditionalForm\`\((\(-7\))\)·\((\(-3\))\)·\((\(-5\))\)\)
=21·(-5)
=-105

[EX5]	(-6) (2 - 10)
=(-6) (-8)
=48

[EX6]	(-6) ((-2) - (-4))
=(-6) (2)
=-12