Objective :
Objective To be able to add and subtract integers with same sign and different sign.
Slide 3:
LET’S SING!!!
Slide 4:
Same sign add and keep different sign subtract take the sign of higher number then it’ll be exact.
Slide 5:
What does the first line of the song tells us about???
Same sign add and keep :
Same sign add and keep
Slide 7:
(+17) + (+5) =(+22) (-2) + (-9) =(-11) (-5) + (-8) =(-13) (-13) + (-7) =(-20) (+2) + (+9) =(+11) (+29) + (+16) =(+45)
Slide 8:
LET’S SING!!!
Slide 9:
What does the second line of the song tells us about?
Slide 10:
Same sign add and keep different sign subtract take the sign of higher number then it’ll be exact.
Different sign subtract :
Different sign subtract
Slide 12:
(-9) + (+5) = (4) (+6) + (-7) = (1) (-6) + (+7) = (1) (+9) + (-9) = 0 Answers are not yet final.
Slide 13:
Take the sign of higher number then it’ll be exact.
Slide 14:
(-9) + (+5) = (-4) (+6) + (-7) = (-1) (-6) + (+7) = (+1) (+9) + (-9) = 0