Adding with the same sign
4 + 7 =
11
–5 + –8 =
= - 13
9 + (–4) =
= 5
–10 + 3 =
= -7
The temperature in the morning was –3°C. By noon, it rose by 5°C. What is the temperature at noon?
The temperature at noon is 2°C.
33 + 22 =
= 55
12 + 6 =
= 18
8 + (–5) =
= 3
–6 + 2 =
= –4
Your bank account has a balance of –$20. You deposit $50. What is your new balance?
You now have $30 in your account.
–4 + (–9) =
= –13
20 + 15 =
= 35
30 + (–20) =
= 10
(–40) + 25 =
= –15
A player loses 15 points in a game (–15), then gains 10 points (+10). What is their score change?
The player’s total score changed by –5 points.
(–210) + (–390) =
= -600
125 + 347 =
= 472
900 + (–900)
= 0
312 + (–500) = –188
= –188
A submarine is at –300 meters below sea level. It ascends 120 meters. What is its new depth?
The submarine is now 180 meters below sea level.
308 + 192 =
= 500
563 + 437 =
= 1000
450 + (–125) =
= 325
–700 + 400 =
= –300
You drive 80 miles in one direction, then realize you went the wrong way and drive back 30 miles. What is your net distance from your starting point?
You are 50 miles away from where you started.