Mental Maths
One of
the tests you will have to do is an oral test. You must try and do the working
out in your head.
These tests see how quick you can answer questions. Many of them will give easy
answers if you listen and think carefully.
The best way to do this type of test is to practise frequently.
Today we are going to do one of these tests.
DON’T PANIC!
INSTRUCTIONS
Below are 20 questions. Get someone to read them to you.
Each question should be read out clearly twice and you have 5 seconds to answer after the second reading of the question.
(Some are 10 seconds and it says ten next to them)
No |
Question |
1 |
19 + 21 |
2 |
401-397 |
3 |
9 X 7 |
4 |
2.1 X 10 |
5 |
205 ÷ 10 |
6 |
An apple costs 40p How much do 3 apples cost? |
7 |
31-12 |
8 |
A bag of sweets weighs 50g How many would weigh exactly 1 kg? |
9 |
A bag of potatoes weighs 56kg how many 5 kg bags can you get from it? |
10 |
What is the biggest number you can make out of the following 3 numbers 2,7,5? |
11 |
2.7 X 100 |
12 |
A square has got sides of length 6 cm What is its area? |
13 |
What is the length of its perimeter, if the sides of the square are 6cm long? |
14 |
In a school of 120 children only 1/4 are boys. How many boys are in the school? |
15 |
A triangle has got three angles a=40 b=50 What is the value of c? |
16 |
If I am facing North and I turn clockwise through 270 degrees. Which direction am I facing? |
17 |
How many grams are there in 4 5 Kg |
18 |
A
sack of letters weighs 2 kg (without the weight of the sack). Each letter
weighs 40g. |
19 |
I
set off on a journey at 9.45 am. I have been travelling for 50 min. |
20 |
How many minutes are there in 3 and half-hours? |
No |
Question |
Answer |
1 |
19 + 21 |
40 |
2 |
401-397 |
4 |
3 |
9 X 7 |
63 |
4 |
2.1 X 10 |
21 |
5 |
205 ÷ 10 |
20.5 |
6 |
An apple costs 40p How much do 3 apples cost? |
£1.20p |
7 |
31-12 |
19 |
8 |
A bag of sweets weighs 50g How many would weigh exactly 1 kg? |
20 |
9 |
A bag of potatoes weighs 56kg how many 5 kg bags can you get from it? |
11 |
10 |
What is the biggest number you can make out of the following 3 numbers 2,7,5? |
752 |
11 |
2.7 X 100 |
270 |
12 |
A square has got sides of length 6 cm What is its area? |
36cm^{2} |
13 |
What is the length of its perimeter, if the sides of the square are 6cm long? |
24cm |
14 |
In a school of 120 children only 1/4 are boys. How many boys are in the school? |
30 boys |
15 |
A triangle has got three angles a=40 b=50 What is the value of c? |
90 degrees |
16 |
If I am facing North and I turn clockwise through 270 degrees. Which direction am I facing? |
West |
17 |
How many grams are there in 4 5 Kg |
4500 |
18 |
A sack of letters weighs 2 kg (without the weight of the sack). Each letter weighs 40g. How many letters are in the sack? (10secs.) |
50 |
19 |
I set off on a journey at 9.45 am. I have been travelling for 50 min. What time is it now? |
10.35 am |
20 |
How many minutes are there in 3 and half-hours? |
210 minutes |
Well how
did you do?
What did you notice about these questions?
They contain the following:
Conversions minutes to hours hours to minutes
Grams to kilograms kilograms to grams
Fractions
Triangles
Area
Perimeters
Numbers close together
X by 10, 100
÷ by 10 ,100
Time
Addition
subtraction
Multiplication
Division.
So these are the things you will need to practise over the next few days.
To finish off here are five more questions. There are more difficult, but you do get 15 seconds to answer each of these.
INSTRUCTIONS
Below are 5 questions. Get someone to read them to you.
Each question should be read out clearly twice and you have 15 seconds to answer after the second reading of the question.
Number |
Question |
1 |
Find 15% of £150 |
2 |
I have £5 and I buy 4 comics at 65p each. How much change will I have? |
3 |
Mr davic is 42. His daughter is 1/3 of his age, but twice as old as his son. What is the age of Mr davic's son? |
4 |
2 kg of apples contains 20 apples. What is the average weight of each apple? |
5 |
What is 25% of a 1/2 |
Number |
Question |
Answer |
1 |
Find 15% of £150 |
£22.50 |
2 |
I have £5 and I buy 4 comics at 65p each. How much change will I have? |
£2.40 |
3 |
Mr davic is 42. His daughter is 1/3 of his age but twice as old as his son. What is the age of Mr davic's son? |
7 years |
4 |
2 kg of apples contains 20 apples. What is the average weight of each apple? |
100g |
5 |
What is 25% of a 1/2 |
1/8 |
Well that
is it for today. I
hope that you didn't find them too tricky.
We will do another one of these before the SATS. Why
not come back and see if you can improve your score? Good
luck!