Adding pos/neg integers
-8 + 13 =
-8 + 13 = 5
85 + f = 96
f = 11
-12 - 6 =
-12 - 6 = -18
What are digits?
Numbers 0-9
If a + b = 13, what could the values of a and b equal?
Responses may vary
-22 + 16 =
-22 + 16 = -6
b + 24 = 51
b = 27
What is the difference between 10 and -8?
10 - -8 = 18
What is a sum?
The answer to an addition problem
d - c = 3
If d = 9, what is c?
c = 6
20 + -32 =
20 - 32 = -12
d - 15 = 62
d = 77
The temperature is -4 degrees. It falls by 7 degrees. What is it now?
-4 - 7 = -11 degrees
What is a difference?
The answer to a subtraction problem
P = 13 + t
If t=5, what does P equal?
P = 18
A shark swims up 17 metres from a depth of -24 metres. What is its new depth?
-7 m
My mom gave me $60 for the week. I bought some new shoes and now I only have $23. How much did the shoes cost?
Write an equation with an unknown value and solve.
$60 - s = $23, s = $37
I only had $9 for coffee but ended up spending $14. How much money is in my account now?
9-14 = -$5
If there are two different operation signs next to each other, which one wins?
The negative/subtraction sign
K = g x 2
If g=7, what does g equal?
g = 14 (7x2)
A crane lifts a treasure chest from a depth of -16 meters. If the treasure chest is lifted 29 meters, what is its depth now?
13 meters
A diver climbed onto the 20 meter diving board. After diving off, they reached a depth of 13 meters below the surface of the water. How many meters did they fall?
Write an equation with an unknown value and solve.
20 - d = -13, d = 33m
A rocket is launched from the bottom of the sea at -32 feet. It flies 14 feet into the air. How far did it travel?
-32 + ? = 14, ? = 46
OR
14 - -32 = 46
What are variables?
Unknown values in calculations, often represented by symbols
40 - a = Y
If a=17, what does Y equal?
Y = 23