We measure length in centimetres (cm) and metres (m). There are 100 cm in 1 m. Slide the worm and read how long it is β short, long, or very long.
The short hand shows the hour; the long hand shows the minutes. We say o'clock, half past, quarter past and quarter to. Move the minute hand and read the clock.
1. How many minutes in one hour? And in half an hour? 60 minutes in an hour; 30 minutes in half an hour.
2. It's 3:15. What time will it be in 30 minutes? 3:45 β that's quarter to four.
3. Put these lengths in order, smallest first: 5 cm, 50 cm, 5 m. 5 cm, 50 cm, 5 m (because 5 m = 500 cm, the biggest).
4. How many 250 ml cups fill 1 litre? 4 cups β because 1 litre = 1000 ml, and 1000 Γ· 250 = 4.
To measure anything you pick a unit β cm for length, grams for mass, ml for liquid β and count how many fit. Bigger units (m, kg, litres) just bundle the small ones: 100 cm = 1 m, 1000 ml = 1 litre.
A clock splits a day into 24 hours, and each hour into 60 minutes. The hands go round and round, measuring time as it passes.