PPT: Comparing Quantities | Mathematics (Maths) Class 8 PDF Download

 Page 1


Ratios and
Proportions
U s i n g r a t i o s t o c o m p ar e q u a n t i t i e s
Page 2


Ratios and
Proportions
U s i n g r a t i o s t o c o m p ar e q u a n t i t i e s How many hours
do you spend
playing games in  
a day?
Page 3


Ratios and
Proportions
U s i n g r a t i o s t o c o m p ar e q u a n t i t i e s How many hours
do you spend
playing games in  
a day?
2 a p p l e s f o r e v e r y 5 b a n a n a s R a t i o s a r e u s e d t o c o m p a r e t h e n u m b e r o f o n e t h i n g t o a n o t h e r . I t ' s w r i t t e n i n t h e f o r m a : b , w h i c h i s r e a d a s " a t o b . " Understanding Ratios
E x a m p l e :
T h e r a t i o o f t h e n u m b e r o f a p p l e s t o t h e n u m b e r o f b a n a n a s i s 2 : 5
Page 4


Ratios and
Proportions
U s i n g r a t i o s t o c o m p ar e q u a n t i t i e s How many hours
do you spend
playing games in  
a day?
2 a p p l e s f o r e v e r y 5 b a n a n a s R a t i o s a r e u s e d t o c o m p a r e t h e n u m b e r o f o n e t h i n g t o a n o t h e r . I t ' s w r i t t e n i n t h e f o r m a : b , w h i c h i s r e a d a s " a t o b . " Understanding Ratios
E x a m p l e :
T h e r a t i o o f t h e n u m b e r o f a p p l e s t o t h e n u m b e r o f b a n a n a s i s 2 : 5
2
5 2 : 5 2 : 7
R a t i o a s a f r a c t i o n P a r t t o w h o l e r a t i o P a r t t o p a r t r a t i o W e c a n e x p r e s s r a t i o s i n d i f f e r e n t f o r m s . Different
Types of
Ratios
Page 5


Ratios and
Proportions
U s i n g r a t i o s t o c o m p ar e q u a n t i t i e s How many hours
do you spend
playing games in  
a day?
2 a p p l e s f o r e v e r y 5 b a n a n a s R a t i o s a r e u s e d t o c o m p a r e t h e n u m b e r o f o n e t h i n g t o a n o t h e r . I t ' s w r i t t e n i n t h e f o r m a : b , w h i c h i s r e a d a s " a t o b . " Understanding Ratios
E x a m p l e :
T h e r a t i o o f t h e n u m b e r o f a p p l e s t o t h e n u m b e r o f b a n a n a s i s 2 : 5
2
5 2 : 5 2 : 7
R a t i o a s a f r a c t i o n P a r t t o w h o l e r a t i o P a r t t o p a r t r a t i o W e c a n e x p r e s s r a t i o s i n d i f f e r e n t f o r m s . Different
Types of
Ratios
3 8 :
p a r t p a r t T h e r e a r e 3 v o l l e y b al l s f o r e v e r y 8 b a s k e t b al l s . C o m p a r i n g o n e p a r t t o a n o t h e r p a r t . Part to
Part
Ratio