Question

What does 0.9 cm mean? It is the same as ______ millimetres. We can also say this is nine-tenths of a cm. Right?
So 30.5 cm is the same as ______ cm and ______ millimetre.
About how many of the big frogs will fit on the 1 m scale? _______
If they sit in a straight line about how many of the small frogs will cover 1 m? _______

Answer 1

We know that,
1 cm = 10 mm
So, 0.9 cm = 9 mm
0.9 cm means 9 mm

It is the same as 9 millimetres.

So 30.5 cm is the same as 30 cm and 5 millimetre.

Now, 30.5 cm = 30 cm and 5 mm

We know that,
1 m = 100 cm

Length of the biggest frog = 30.5 cm
Thus, a maximum of 3 big frogs can fit on 1m scale.

Length of each small frog = 0.9 cm
Thus, a maximum of 111 small frogs can sit in a straight line and cover 1 m.