Flashcards
Maths stuff
Cards in this deck (10)
- 1Area and Perimeter: What is the equation to find the area of a shape?LxW / 2 (Length x Width divided by two
- 2A right angled triangle has a base of 15cm and a height of 10cm. What is the area? Explain how you would work this out.Create an identical triangle to form a rectangle. You then multiply the two numbers together and divide them by two, ending up with an area of 75cm squared
- 3What is the equation to find the area of a trapezium?a+b
2
(a plus b divided by 2) - 4Using the Chinese method, work out 2.32 x 0.7The answer would be 1.624
- 5What is the difference between and expression and an equation?equation: 5x+6 (it has no equals sign)
expression: y=5x+6 (it has an equals sign) - 6The bottom row of the table goes: x | -8 | -5 | -2 | 0 | 4 | 7 Plot y= 3x +1The table should now read:
y | -3 | -2 | -1 | 0 | 1 | 2
x | -8 | -5 | -2 | 0 | 4 | 7 - 7Just note: The equation of a linear graph is written in the form y=mx+c. M tells us the gradient of the line. We call this the coefficient of x. C tells us where the graph crosses the y axis. We call this the y interceptThe more you know :D
- 8Prefixes for powers of 10 By the way, # means to the power of .... tera - T - 10#12 - 1 000 000 000 000 giga - G - 10#9 - 1 000 000 000 mega - M - 10#6 - 1 000 000 kilo - k - 10#3 - 1000deci - d - 10#-1 - 0.1
centi - c - 10#-2 - 0.01
milli - m - 10#-3 - 0.001
micro - ? - 10#-6 - 0.000 0001
nano - n - 10#-9 - 0.000 000 001
pico - p - 10#-12 - 0.000 000 000 001
Search on google 'scale of the universe' to find out how big 10#12 is! - 9Round these numbers to 3 s.f 1.) 6.3528 2.) 34.026 3.) 0.005708 4.) 150.932 5.) 0.000078351.) 35
2.) 34.0
3.) 0.oo571
4.) 151
5.) 0.0000784 - 10a.) 4-6= b.) 5-7= c.) 2-4 d.) -1-1= e.) -3-2= f.) -4-(-1)= g.) 3-(-4)=a.) -2
b.) -2
c.) -2
d.) -2
e.) -5
f.) -3
g.) -1