LESSON 1 - NUMBERS

LEAD-IN

Listen and write numbers !

 

N – set of natural numbers

 

C – set of integers

 

W( or Q) – set of rational numbers

 

Rational number – a number that is either an integer or can be written as a quotient of two integers.

Fraction – a quotient of one number by another, indicated by a/b, for example 5/8, -3/7

 

 

R – set of real numbers

 

Positive number – a real number which is greater than zero

Negative number – a real number which is less than zero

GLOSSARY

 

 

quotient - iloraz

indicate - oznaczać

obtain – uzyskać , otrzymać

expression - wyrażenie

digit – cyfra

arrange- ułożyć

READ ME

 

 

Number 23799056 has got eight digits.

 (Ta liczba ma osiem cyfr)

The third digit is 7. (Trzecia cyfra to 7)

 


USEFUL PHRASES

 

The set of all rational numbers is denoted by Q or W

triple digit number– trzycyfrowa liczba ( e.g. 345 )

double-digit number – dwucyfrowa liczba ( e.g 56)

double digits - liczby dwucyfrowe (e.g. 34)

 

greater than   >

less than <

equals =


FILL IN THE GAPS

 

 

Natural number …... is greater than 9 and less than 11.

 

Integer ….........is less than – 43 and greater than – 45.

 

Rational number can be written as a …....................of two integers.


LABEL TRUE OR FALSE

 

 

Any natural number is also a integer (T/F)

 

 

The greatest negative integer is (– 1) (T/F)

 

 

-7 is a natural number (T/F)

 

 

34 is a integer because it is a whole number (T/F)


SELECT THE PHRASE that best completes the sentence :

(must be,cannot be,can be but needn’t be)

 

Rational number ….............. a integer.

 

Natural number ….............a positive number.

TIME FOR PROBLEMS AND EXERCISES

 

 

  1. How do you write this number using digits?

    Twenty-nine ….........

    three hundred thirteen...................

  2. How do you write this number using words?

    409...............................

    856...............................

  3. Which of number is a natural number ?

    a) -5

    b) 7/8

    c) 8/4

     

  4. Which list shows these numbers in order from least to greatest?

    64, 91, 63, 65, 68

 

 

91 < 65 < 68 < 63 < 64

 

91 < 68 < 65 < 64 < 63

 

63 < 64 < 65 < 68 < 91

 

63 < 91 < 65 < 68 < 64

 

5)Arrange these numbers from least to greatest

6, -4, 13, -9/2, 25/2

.......................................................

6)If you arrange these numbers from least to greatest, which number will come

fourth? 11, 64, 21, 23, 26

 

7) Which sign makes the sentence true? (-56)..........(-55)

QUIZ

LESSON 1 - MATERIALS

Worksheet for learners and teachers
Numbers1Learners.pdf
Adobe Acrobat Document 121.4 KB