1Vab Ch 2 Numbers 24-25 PTI

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 1

Unknown words in chapter

How many thousands has the number 45886?

The number of hundreds in 9876 is

1. 9
2. 8
3. 7
4. 6

In English 100 000 is named as

1. ten thousand
2. million
3. hundred thousand
4. ton

Choose the right symbol:
2 ...... 10

1. <
2. >
3. =
4. all are good

0, 1, 2, 3 are called (see page 54)

1. whole numbers
2. full numbers
3. natural numbers
4. nice numbers

5673 consists of .... units

1. 5
2. 6
3. 7
4. 3

Homework & Planner

Every lesson you bring and show your Planner.

Also colour ONE BOX after you've checked your homework.

When you lost your Planner, you need to print

 a new one via  Magister Studiewijzers.

Evaluation

2.2 Divisors

words:

- divisor

- prime number

- multiple

- even number <-> odd number

- prime number

Learn by heart:

2 3 5 7

11 13 17 19 23 and 29

video in English

Time to work

Evaluation

2.2 Divisors part 2

-

                                                      - how to write a number as a                                                                               multiplication of Prime Numbers 

Recap:

Write first 5 prime numbers

Recap:

Write down the first 5 prime numbers:

2, 3, 5, 7, 11

Which is the odd number:

14   or   7

Explain why 

Which is the odd number:

14   or   7

Explain why 

7, because ODD means: "not divisible by 2 (and get a natural (whole) number)!"

Questions about Homework

  Writing a number as 

a multiplication of Prime Numbers =>

smallest prime number? 

Is it divisible by .....                       6 = ......x ......

ex 20. Write as a multiplication of Prime Numbers

20 = .... x .... x ......       ??

Step 1: divide by the smallest prime possible

Step 2: divide by the smallest prime

etc etc  => so first divide by 2 and if possible again by 2, divide by 3,......, divide by 5 and so on

20 = 

Write 20 as a multiplication of prime numbers:

                            2                                           20 = ...... x ....... x........ 

                            3

                           5

                           7

Use branches of a tree

Time to do your homework

Evaluation

Write down 32 as a muliplication of prime numbers

                                        32 = ..... x ...... x ....... x .......

2.3. Fractions (& decimal numbers)

> decimal numbers  5.7   (NOTE the DOT!!)

How do you round a decimal number?

to ONE decimal place:

12. .......   (You have to know this for the Test!)

> draw a dotted line AFTER the FIRST digit to the right of the decimal point

> if that digit is 5 or higher -> make the digit to the left 1 higher

    if that digit is 4 or lower, don't change the digit left to the dotted line

example

round 2.685 to ONE decimal!

round 2.685 to TWO decimals.

Time to work

Evaluation

2.4 Decimals

clip Fibonacci

< and > 

Be careful!

Further to the left 'smaller'!

Homework

Evaluation

End of chapter

Time to work

You may choose:

> S- exercises

> Test Yourself

> Practice Test (Workbook -> solutions in the back)

Have a nice holiday!