# Y1 S4 lesson on numbers year 1

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Slide 1: Video
EngelsMiddelbare schoolhavoLeerjaar 1

This lesson contains 26 slides, with interactive quizzes, text slides and 4 videos.

## Items in this lesson

Numbers

#### Slide 2 -Slide

What numbers did you see?
Write them like this:
four, twenty-seven...

#### Slide 3 -Mind map

So we have cardinals and ordinals.
we use cardinals for counting

one, two, three, four...

#### Slide 5 -Slide

So we have cardinals and ordinals.
we use ordinals when we want to give order to things.

first, second, third, fourth...

#### Slide 7 -Slide

What did they forget here.........?

#### Slide 8 -Slide

What did they forget?
twenty one - twenty first.......

#### Slide 9 -Open question

there are two kinds of numbers. Do you know which two kinds?
A
ordinary and extraordinary numbers
B
cardinal and ordinal numbers
C
plain and special numbers
D
there are no two kinds of numbers, Ivo! What were you thinking?!

#### Slide 10 -Quiz

cardinals
ordinals
Twenty-first century
he came in second place
The simpsons are on channel nine
world war two lasted more then five years
The steamengine was invented in the nineteenth century
most of you are twelve years old
The first world war lasted from nineteenfourteen to nineteeneighteen

#### Slide 11 -Drag question

important!
to make an ordinal number out of a cardinal there are some rules you simply need to learn:
1: one turns into first (or 1st).
2: two turns into second (or 2nd).
3: three turns into third (or 3rd)
from here it gets easier.
4: four turns into fourth (or 4th)

#### Slide 12 -Slide

A few things that you must remember!
As soon as you pass twenty you need to use a hyphen between the decimal and the numeral.

for cardinals:
so 21 is written as twenty-one, 22 is written as twenty-two etc.

for ordinals:
21st is written as twenty-first, 22nd is written as twenty-second, 23rd is written as twenty-third etc.

#### Slide 13 -Slide

one more thing...
when you come to the hundreds or even thousands you spell them as if you count the hundreds/thousands/millions.
Like so:
(one) hundred, two hundred, five thousand, ten million etc.
(note that there's no hyphen!)

#### Slide 14 -Slide

What number is spelled correctly?
A
My father is fifty-five years old.
B
Mum celebrated her fiftysecond birthday.
C
Her brother got his seventh birthdaycard.
D
Grandma has eightytwo candles on her birthdaycake

#### Slide 15 -Quiz

when do you need to use a hyphen (een streepje) between numbers
A
Between the first and the second letter.
B
Above twenty, between the decimal and the numeral.
C
Only with ordinal numbers
D
When cardinals are spelled wrong.

#### Slide 16 -Quiz

How old is Ivo?
A
He is forty one years old.
B
He is forty-six but he feels as if he were twenty-seven.
C
He pretends to be young but is really, really old.
D
He is only thirtynine years old.

#### Slide 17 -Quiz

Days of the week?

Seasons?

#### Slide 23 -Slide

Months of the year?