Adding & Subtracting Integers
8 + (-8)
0
8(-2)
-16
2x + 5 = 15
x = 5
If the radius of a circle is 6.6 inches, what is the diameter?
13.2 inches
What is the 2D shape I would get if I cut a cube horizontally?
Square
12 - (-9) + 2
23
(-9)(-3)
27
3x + 6x = 99
x = 11
I want to survey the 7th grade about their favorite ice cream flavor. How could I collect a random sample of 30 students to ask?
Answers vary
Find the volume of a rectangular prism with sides of 7 cm, 4 cm and 5 cm.
140 cubic centimeters
-12 + 10
-2
45 ÷ -9
-5
x + 8 = 2x - 5
x = 13
-3x-4<-25
x>7
Flip the sign when dividing by a negative!
Find the surface area of a rectangular prism with sides of 7 cm, 4 cm and 5 cm.
166 cm squared
-8 + 10 - 5 + 1
-2
-10(2) ÷ 5
-4
2x + 4x + 9 = 4x + 1
x = -4
2x + 4x + 9 = 4x + 1
6x + 9 = 4x + 1
2x + 9 = 1
2x = -8
x = -4
No calculator: use long division to divide 5/6
Classify it as a terminating or repeating.
0.8333333
Repeating
Find the volume of a hexagonal prism with the area of the base being 48 cm, and the height of the prism being 6.2 cm
48(6.2) = 297.6 cm cubed
- 20 + (-10) + 5 - (-2)
-23
-50(-2) ÷ 4 ÷ 5
5
4x + 8 - 2x = x + 3 + x + 5
2x + 8 = 2x + 8
All real numbers!
A triangle has lengths of 3, 12, and 14.
What type of triangle is it?
Scalene
Find the surface area of a pentagonal prism with:
Perimeter of base: 10 cm
Area of base: 12 cm squared
Height of prism: 10 cm
124 cm squared