Addition
6+(-4)
2
8 - 12
-4
What do you do when adding integers with the same sign?
Add and keep the sign
-6-4
-10
(-6)+9
3
-9+(-7)
-15 - 6
-21
Explain why
-8 + 12 = 4
Different sign subtract and put the bigger number sign
245 - 50
195
15+(-9)
6
(-25)+18
-7
(-24) - (-16)
-24+16
= -8
What will you do adding integers with different signs?
Subtract and put the grater number sign
(-30)-(-12)
-30+12
=-18
-76+12
-64
-37+(-96)
-133
56 - (-84)
56+84
=140
Is this true? Give reason
15 + (-20) = -5
True
(-28)-(-70)
-28+70
=42
(-98)+19
-79
Temperature was -12°C. It rose by 19°C. What is the new temperature?
Meaning of Rose : Increases
-12+19 = 7°C
A deep sea driver is at -40m and descends another 25m. What is the final depth?
-40-25
=-65
A bank account has a balance of -200 rupees. Rupees 350 is deposited into the bank. What is the new balance?
-200+350
=150
A hiker is at an elevation of 20m and descends 55m. What is the final elevation?
20-55
=-35
A submarine is at -80m and rises 45m. What is its new position?
-80+45
=-35