Number Skills
Will the answer to this question be positive or negative: -4,5 x -81
Positive
Simplify: 15x5 / 2x2
7,5x3
How many lines of symmetry does a triangle have?
3
2,87 / 0,4
7,175
Simplify: 5x + 20x2 - 18x + 3x2
-13x + 23x2
An isosceles triangle has an angle of 94 degrees. What are the other two angles?
43 degrees
-3,79 + 12,3
8,51
Solve for x: 3x + 18 = 5x - 6
x = 12
A map is drawn in a scale of 1: 200 000. If two cities are 4km apart in real life, how far apart are they on the map in cm?
1cm: 200 000 cm
? : 400 000 cm
2 cm on the map
Which calculation will have an answer a little bit over 30:
(30 / 0,97) (30 x 0,97) (30 / 0,097) ( 30 x 0,097)
30/0,97
If x = -3 and y = 8, what is 12x - xy
12(-3) - (-3)(8)
-36 - (-24)
-36 + 24
-12
If a cube has a volume of 512 cm3, what is the surface area of the cube?
8 x 8 x 8 = 512
Surface area: (8x8) x 6
384cm2
Ann gets paid 300 kr for every hour of work. If she gets paid down to the minute, how much would she get paid for 28,6 hours of work?
300 / 60 = 5 kr per minute
0,6 x 60 = 36 minutes
(28 x 60) + 36 = 1716 minutes
1716 x 5 = 8580 kr
Write an equation and solve: The school spent 2574 dollars on a field trip to a play. It cost 250 dollars to get a bus and then a certain amount for every student to get a ticket. If there were 83 students, how much was one ticket?
83x + 250 = 2574
83x = 2324
x = 28
28 dollars
If you use 3,14 as pi, a circle has an area of 254,34 cm2. What is its circumference?
56,52 cm