Похожие презентации:
Fractions
1. Fractions
Oleg Petrov2. Description
The word fraction is derived from the Latin word fractio,which means to break.
A fraction is the indicated quotient of two expressions.
a
b
5
7
5 xy
14 z
3. Arithmetic with fractions
Equivalent fractionsComparing fractions
Subtraction
Addition
Multiplication
Division
5 1 10
= =
10 2 20
3 2
>
4 4
4 2 2
− =
5 5 5
1 3 4
+ = =2
2 2 2
1
×
4
1
÷
2
3
3
=
7 28
1 1 4
= × =2
4 2 1
4. Forms of fractions
Common or simple or vulgar fractions.Complex fraction.
1
2
3
4
Proper fraction.
3 7
,
4 9
Improper fraction.
9 8
,
2 6
Mixed fraction.
3
3
2+ = 2
4
4
1 3 a
, ,
2 4 b
5. Reducible and Irreducible fractions
Any reducible fraction such as 4/6 in which thenumenator and denominator have a common factor
greater that the unity.
Any irreducible fraction is a common fraction such as
2/7 in which the numerator and denominator are
relatively primes.
6. Fractions
Oleg Petrove-mail: [email protected]
tel. +792304028344