Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Add mentally
When we add numbers mentally, we are trying to
find a quick way of adding the numbers in our
heads.
Example:
Add 427 and 298
mentally.
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Add mentally
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Bar graph
A bar graph uses bars instead of pictures or
symbols to show data.
Example:
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Bar graph
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Centimetre (cm)
A unit of measurement for length.
Example:
The length from the 0 mark to the 1 mark on the
ruler is 1 centimetre (or 1 cm).
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Centimetre (cm)
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Century
A century is a period of 100 years.
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Century
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Common
denominator
Example:
2
4
The fractions and have the same denominator.
6
6
We say that they have a common denominator.
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Common denominator
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Common
numerator
Example:
4
4
The fractions and have the same numerator.
7
9
We say that they have a common numerator.
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Common numerator
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Decade
A decade is a period of 10 years.
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Decade
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Denominator
In a fraction, the denominator is the number below
the line.
Example:
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Denominator
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Double
When we find the double of a number, we add the
number to itself.
Example:
Double 100 = 100 + 100
So, double 100 = 200.
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Double
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Duration
Example:
A carnival lasted for 4 days. We can also say that
the duration of the carnival was 4 days.
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Duration
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Equivalent
fractions
Fractions that have different numerators and
denominators, but the same value.
Example:
4
2
So, is an equivalent fraction of .
6
3
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Equivalent fractions
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Frequency
The number of times something occurs.
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Frequency
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Frequency table
A table that lists items and shows the frequency or
number of times they occur.
Example:
From the frequency table, we know that 3 children like
bananas best.
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Frequency table
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Gram (g)
A unit of measurement for mass.
Example:
The mass of the apple is 200 grams (or 200 g).
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Gram (g)
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Half
When we find half of a number, we divide the
number by 2.
Example:
80 ÷ 2 = 40
So, half of 80 is 40.
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Half
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Interval
Example:
When we count on in weeks, we are counting on in
intervals of 7 days.
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Interval
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Kilogram (kg)
A unit of measurement for mass.
Example:
The total mass of the four oranges is 1 kilogram
(or 1 kg).
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Kilogram (kg)
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Kilometre (km)
A unit of measurement for length.
Example:
Ari jogs around the park twice. He runs a total
distance of 1 kilometre (or 1 km).
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Kilometre (km)
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Litre (l)
A unit of measurement for capacity.
Example:
This is a 1-litre (or 1-l) measuring jug.
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Litre (l)
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Metre (m)
A unit of measurement for length.
Example:
The length of the cabinet is 1 metre (or 1 m).
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Metre (m)
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Millilitre (ml)
A unit of measurement for capacity.
Example:
This is a 500-millilitre (or 500-ml) measuring jug.
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Millilitre (ml)
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Number bond
A number bond shows the parts that make up the
whole.
Example:
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Number bond
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Numerator
In a fraction, the numerator is the number above
the line.
Example:
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Numerator
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Past
Past is used to show that it is after a certain time.
Example:
7.13
7.13 is 13 minutes past 7.
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Past
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Pictogram
A way to organise data using pictures or symbols;
can also be known as a picture graph or pictograph.
Example:
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Pictogram
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Quarter past
Example:
10.15
10.15 is a quarter past 10.
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Quarter past
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Quarter to
Example:
10.45
10.45 is a quarter to 11.
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Quarter to
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Simplest form
We get the simplest form of a fraction when we
cannot divide the numerator and denominator
further by any common number, except 1.
Example:
1
6
So, 2 is the simplest form of 12 .
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Simplest form
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Subtract
mentally
When we subtract numbers mentally, we are trying
to find a quick way of subtracting the numbers in
our heads.
Example:
Subtract 304 from
686 mentally.
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Subtract mentally
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Symbol
We use symbols to represent items in pictograms.
The symbol in a pictogram can stand for more than 1 unit.
Example:
3
stands for 6 children. So, 6 children like Super
Ben cartoon best.
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Symbol
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Tally chart
A table which uses tally marks (/) to show data.
Example:
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Tally chart
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Tally mark
We use tally marks (/) to help us record data and
keep count of items.
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
Tally mark
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
To
To is used to show that it is before a certain time.
Example:
8.50
8.50 is 10 minutes to 9.
Maths SMART Grade 3 © 2012 Alston Publishing House Pte Ltd
To