Angles
An angle whose measure lies between 0° and 90° is known as __________ angle.
RIGHT ANGLE
3/4 x 20 =
15
Write the factors of 18.
1 2 3 6 8 9 18
6 − (−3) + √25
what is 1/4 in decimal form?
0.25
120° is known as __________ type of angle.
OBTUSE ANGLE
Rachel took 1/2 hour to paint a table and 1/3 hour to paint a chair. How much time did she take in all?
1/2 +1/3 = 5/6
what are the common factors of 60 and 90?
1 2 3 5 6 10 15 30
5 − (−5) − (2) 3 =
2
factorise 9x2 + 15xy =
3x (3x + 5 y)
How many degrees are there in three right angles?
270
If 3 (1/2) m of wire is cut from a piece of 10 m long wire, how much of the wire is left?
10/1 - 7/2 =13/2 @ 6 (1/2)
What is the sum of factors of 12?
1 + 2 + 3 + 4 + 6 + 12 = 28.
−10 + √16 − 3 − (−12)
3
how many bricks does it take to complete a building made of bricks?
one brick - the last one
Use the hints to work out the angles. Three angles make up a straight line. Angle A is half of angle B. Angle C is five more than 130˚.
All the angles are multiples of 5. What are the 3 angles?
A = 15˚, B = 30˚ and C = 135˚
A herd of cows gives 4 litres of milk each day. But each cow gives one-third of total milk each day. They give 24 litres milk in six days. How many cows are there in the herd?
4 divide by 4/3 =
4 x 3/4 = 3
Find the greatest common factor of 20 and 6?
The factors of 6 are 1, 2, 3 and 6.
The factors of 20 are 1, 2, 4, 5, 10 and 20.
Thus the greatest common factor of 6 and 20 is 2.
8 + 3√125 − (−3) 3 =
40
can you add 2 to 11 and get 1? How?
in a clock
The minute hand on the clock moves from the 12 all the way round and passes the 12 again, and stops at 9.
It makes a 540˚ angle.
True or false? Explain why.
False – it has turned a full turn and a three-quarter turn. 360˚ + 270˚ = 630˚.
45% of 240
108
what is the common multiple of 5 and 13?
65
− 9 /−3 × (−2)(3) + 1 =
-17
How do you go from 98 to 720 using just one letter?
Add an "x" between "ninety" and "eight". Ninety x Eight = 720