Google Classroom
GeoGebraGeoGebra Classroom

Multiplying integers (Positive or negative)

Introduction

We just learnt that negative numbers do exist and they almost like whole numbers except they are negative. But what happens when we need to multiply such numbers ? A very good online article at MathisFun explains this very well. Click below to go to the site https://www.mathsisfun.com/multiplying-negatives.html Then use the applet below to try multiplication of negative numbers and answer the questions below the applet

Use the applet above to explore and multiply integer numbers between -5 and 5.

Create 5 multiplication problems and record them with the answers you found above in the answer box below (eg. ( (-1) (-5) = 5, 3(-5)=-15)

What happens when a positive number is multiplied by a negative number? And when a negative number is multiplied by a positive number?

What happens when a negative number is multiplied by a negative number? And when a positive number is multiplied by another positive number?

Try more problems. Do the observations you made previously always hold true?