Expressing from Lower Unit to Higher Unit -
1) Express in km using decimal notation :-
a) 365 m
1
As we know, 1 m = -------- km [1 Km = 1000 m]
1000
So,
365
365 m = --------- Km
1000
= 0.365 km (Ans.)
b) 99 m
1
As we know,1 m = -------- [1 Km = 1000 m]
1000
99
99 m = --------- km
1000
= 0.099 km (Ans.)
2) Express in metres using decimal notation :-
a) 50 cm
1
As we know that, 1 cm = -------- m [1 m = 100 cm]
100
50
So, 50 cm = ---------- m
100
= 0.50 m = 0.5 m (Ans.)
b) 220 cm
1
As we know that, 1 cm = -------- m [1 m = 100 cm]
100
220
So, 220 cm = ---------- m
100
= 2.20 m = 2.2 m (Ans.)