thilini pabasarra

MR/POLWATHUMODARA MAHA VIDYALAYA

​DIRECTED NUMBERS

​Directed numbers are integers which have a particular size/magnitude and a direction (positive + or negative -)

EX: (+3) , (-3) , (+10)

What are Directed Numbers?

MR/POLWATHUMODARA MAHA VIDYALAYA

Introduction of Directed Numbers

ADDITION DIRECT NUMBERS

(+3) + (+5) = (+8)

(-3) + (-5) = (-8)

(-3)+ (+5) = (+2)

(-5)+ (+3) = (-2)

MR/POLWATHUMODARA MAHA VIDYALAYA

Multiple Choice

(+7) +(+18)

• 10

• 11

• 25

• 32

Multiple Choice

(-20) + (-15)

• -5

• +5

• -40

• -35

Multiple Choice

(-25) + (+16) + (-1)

• -10

• -42

• -40

• +10

Fill in the Blanks

(-10) + (+12) + (-3) +(+6)