Unit 1
Unit 2
Unit 3
Unit 4
ALL
100
Round this number to 2 significant figures:
4328.418
4300
100
Write 109/15 as a mixed number
7 (4/15)
100
3 x 3 x 32 = 3a
Work out the value of a.
a = 1 + 1 + 2 = 4
100
Give an example of natural number, integer and a rational number.
natural number: 3
integer: -2
rational number: 7/8
100
5 + 30 / 5
Sofia says that the answer is 7. She is wrong. Explain why she is wrong.
Sofia add 5 and 30 and then she divide it by 5. That does not follow the rules. Division has priority. Therefore, Sofia should have divided 30 by 5 (equals 6) and afterwards added 5 (end result = 6 +5 = 11
200
Round this number to 3 decimal places:
7.568499
7.568
200
Sara spent 120 minutes on Saturday in Soccer practice, 60 minutes in a birthday party and 1 hour working on her Science project.
What is the ratio of hours spent at soccer practice to hours spent at a birthday party.
120 : 60
simplest form
2 : 1
200
How much is 70
1
200
Work out the following:
a) cube root of 27
b) square root of 100
a) 3
b) 10 or -10
200
estimate the value of the root square of 83 (1 decimal place)
9.1
(because root square of 81 is 9)
300
53: 7
give your answer correct to two decimal places.
7.57
300
Write the following ratio in the form c:1
13:7
(13/7) : 1
300
To calculate the energy, we can use the formula E=m.c2. E is the energy, m is the mass and c is the speed of light. Calculate the energy of an object with a mass of 10 kg and considering the velocity of light 300 000 000 m/s.
E = 10 x (300 000 000)2 = 10 x 90 000 000 000 000 000 = 900 000 000 000 000 000
300
Consider the following formula for calculating the total monthly cost, in euros, in terms of the number of minutes used on a phone:
c = 10 + 0.012 m
If the owner spends 30 minutes on his phone, how much will he pay?
c = 10 + 0.012 x 30 = 10.36
300
give an example of an:
a) expression
b) equation
c) formula
a) 2x + 4
b) 2x + 4 = 8
c) E = mc2
400
Work out:
a) 450 x 0.1 =
b) 450 x 10 =
c) 450 / 0.1 =
d) 450 / 10 =
a) 45
b) 4500
c) 4500
d) 45
400
How much is:
a) 10% of 300
b) 25% of 140
c) (1/3) of 150
d) 70% of 200
a) 30
b) 35
c) 50
d) 140
400
Jared has two pieces of string, one with 136 cm and 24 cm in length.
He cuts both pieces into smaller pieces that are equal in length.
Work out the greatest possible length for each smaller piece.
136 = 23 x 17
24 = 23 x 3
HCF (136 and 24) = 23 = 8 cm
400
x - 1 < 5
Work out an inequality that is equivalent
x < 6
400
Work out the following:
8 (4/7) - 3 (2/7)
5 (2/7)
500
Work out:
0.1 x 0.1 + 10 / 100
0.01 + 0.1 = 0.11
500
One sweatshirt costs 20 euros in store A. The same sweatshirt costs 25 euros in store B.
During the holidays both stores have discounts on the sweatshirt.
Store A gives 20% discount and store B gives 30% discount.
Work out how much the sweatshirt would cost in each store and where would be cheaper to buy it.
20 x 0.8 = 16 euros (store A)
25 x 0.70 = 17.5 euros (store B)
It is cheaper in store A.
500
Work out:
102 - 5 x 6 + root square (23+1)
100 - 30 + root square (9) =
= 70 + 3 =
= 73
500
Consider the blue rectangle:
a) Write an expression, in terms of x, for the perimeter.
b) If the perimeter is 43 cm, work out the length of the longest side.
a) 10x + 18
b) x = 2.5 cm, longest side = 14.5 cm
500
Emily has some stickers. Grace has twice as many stickers as Emily. Laura has 12 more stickers than Emily. In total, they have 76 stickers. How many more stickers does Grace have than Laura?
Emily has 16 stickers, Grace has 32 and Laura has 28. Grace has 4 more stickers than Laura.