maths smart grade 2 © 2012 alston publishing house pte ltd about

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdAbout

AboutM

aths SMART G

rade 2 © 2012 Alston Publishing H

ouse Pte Ltd

Example:

Jess is as tall as the metre ruler. She is about 1 metre tall.

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdAdd mentally

Add mentallyM

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ouse Pte Ltd

Example:

Add 58 and 8 mentally.

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdAfter

AfterM

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ouse Pte Ltd

Example:

Tuesday comes after Monday.

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte Ltda.m.

a.m.M

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ouse Pte Ltd

Any time from midnight to before noon.

Example:

7.25 in the morning can also be written as 7.25 a.m.

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdBar graph

Bar graphM

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A bar graph uses bars instead of pictures or symbols to show data.

Example:

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdBefore

BeforeM

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Example:

Wednesday comes before Thursday.

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdCalendar

CalendarM

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A table or chart that shows the days of the week and months of the year.

Example:

This calendar is for the month of January in the year 2012.

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdCarroll diagram

Carroll diagramM

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ouse Pte Ltd

A Carroll diagram helps us sort data in a ‘yes’ or ‘no’ manner. A simple Carroll diagram has two groups.

If the first group is labelled ‘A’, then the second group is usually labelled ‘Not A’.

Carroll diagramM

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Example:

The Carroll diagram sorts the children according to whether they wear glasses.

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdCentimetre (cm)

Centimetre (cm)M

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ouse Pte Ltd

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 SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdCents (¢)

Cents (¢)M

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ouse Pte Ltd

A unit of measurement for money.

Example:

The quarter has a value of 25 cents. We can also write it as 25¢.

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdChange

ChangeM

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Example:

Tom buys a top that costs 45¢.

He will get back 30¢ in change if he pays the cashier 75¢.

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdDivide

DivideM

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We divide to share objects equally among groups or put objects into equal groups to find the number of groups. We use ÷ when we divide.

DivideM

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Example:

Share the storybooks equally between Tom and Ari.

Each boy gets 2 storybooks.

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdDivision sentence

Division sentenceM

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ouse Pte Ltd

Example:

‘4 ÷ 2 = 2’ is a division sentence. We read this as ‘4 divided by 2 equals 2’.

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdDollars ($)

Dollars ($)M

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ouse Pte Ltd

A unit of measurement for money.

Example:

This note has a value of 10 dollars. We can also write it as $10.

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdDouble

DoubleM

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When we find the double of a number, we add the number to itself.

Example:

Double of 20 = 20 + 20So, double of 20 = 40.

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdEarlier

EarlierM

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ouse Pte Ltd

Example:

2.10 p.m. is 30 minutes earlier than 2.40 p.m.

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdGram (g)

Gram (g)M

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ouse Pte Ltd

A unit of measurement for mass.

Example:

The mass of the sweet is 5 grams (or 5 g).

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdHalf

HalfM

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When we find half of a number, we divide the number by 2.

Example:

24 ÷ 2 = 12So, half of 24 is 12.

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdHalf litre ( l)2

1

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte Ltd

Half litre ( l)12

A unit of measurement for capacity.

Example:

The capacity of the vase is half litre (or l).21

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdHeavier

HeavierM

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ouse Pte Ltd

Example:

The pineapple is heavier than the papaya.

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdHeaviest

HeaviestM

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ouse Pte Ltd

Example:

The watermelon is the heaviest.

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdKilograms (kg)

Kilograms (kg)M

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A unit of measurement for mass.

Example:

The mass of the bag of sugar is 1 kilogram (or 1 kg).

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdLater

LaterM

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ouse Pte Ltd

Example:

10.20 a.m. is 1 hour later than 9.20 a.m.

1 hr later

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdLess than

Less thanM

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ouse Pte Ltd

Example:

The stool is shorter than the metre ruler. It is less than 1 metre tall.

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdLighter

LighterM

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Example:

The tennis ball is lighter than the basketball.

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdLightest

LightestM

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Example:

The beach ball is the lightest.

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdLitre (l)

Litre (l)M

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A unit of measurement for capacity.

Example:

This is a 1 litre (or 1 l) measuring jug.

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdLonger

LongerM

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ouse Pte Ltd

Example:

Pencil B is longer than Pencil A.

Pencil C

Pencil B

Pencil A

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdLongest

LongestM

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ouse Pte Ltd

Example:

Pencil C is the longest.

Pencil C

Pencil B

Pencil A

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdMetre (m)

Metre (m)M

aths SMART G


ouse Pte Ltd

A unit of measurement for length.

Example:

The ruler is 1 metre (or 1 m) long.

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdMidnight

MidnightM

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ouse Pte Ltd

The end of one day and the start of the next.

Example:

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdMore than

More thanM

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Example:

The teacher is taller than the metre ruler.She is more than 1 metre tall.

Maths SM

ART Grade 2 ©

2012 Alston Publishing House Pte LtdMultiples

MultiplesM

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ouse Pte Ltd

Example:

When any number is multiplied by 2, the answer is a multiple of 2.

Maths SM

ART Grade 2 ©


Multiplication sentence

Multiplication sentenceM

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Example:

‘2 × 4 = 8’ is a multiplication sentence. We read this as ‘2 times 4 equals 8’.

MultiplyM

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When we add equal groups together, we are multiplying. We use × when we multiply.

MultiplyM

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Example:

We can multiply to find out how many apples there are.

2 groups of 4 = 8 2 × 4 = 8

There are 8 apples altogether.

NoonM

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Middle of the day.

Example:

NoteM

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Example:

This is a one dollar ($1) note. It has two sides – front and back.

Number bondM

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A number bond shows the parts that make up the whole.

Example:

2 and 5 make 7.

p.m.M

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Any time from noon to before midnight.

Example:

7.25 in the evening can also be written as 7.25 p.m.

Repeated additionM

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Example:

We can use repeated addition to find out how many ducklings there are in 3 groups of 2.

3 groups of 2 = 2 + 2 + 2= 6

There are 6 ducklings in 3 groups of 2.

ScaleM

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Measurements marked at regular intervals on a graph.

Example:

Scale

ShorterM

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Example:

Crayon C is shorter than Crayon A.

ShortestM

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Example:

Crayon B is the shortest.

Subtract mentallyM

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Example:

Subtract 4 from 46 mentally.

TallerM

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Example:

Giraffe B is taller than Giraffe A.

TallestM

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Example:

Giraffe C is the tallest.

TimetableM

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Example:

This is a weekly timetable.

Weighing scaleM

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A scale that measures the masses of objects.

Example:

We can read the mass of the notebook by looking at the markings on the weighing scale. The red pointer is at 100. So, the mass of the notebook is 100 g.

maths smart grade 2 © 2012 alston publishing house pte ltd about

Documents

number of groups

equal groups

simple carroll diagram

sort data