Page 12 - E - Book Prim 4
P. 12
Delta Modern Language Schools
Primary stage
Maths Department
Prim 4 2024-2025
Convert Metric mass units
➢ 1 kilogram = 1000 grams (1 kg= 1000 gm )
➢ 1 ton = 1000 kilogram
apacity units
Convert Metric c
units
➢ 1 liter = 1000 millilitre ( 1 L = 1000 ml )
Conver Metric time units
➢ 1 week = 7 day
➢ 1 day = 24 hours ( hr)
➢ 1 hour = 60 minutes ( min)
➢ 1 minute = 60 seconds (sec)
Remark :
Elapsed time is the time that passes from the start to the end of an
activity
There are different ways to calculate the elapsed time : (add times)
Hours : minutes
3 : 40
+ : 30
4 : 10 ( Rename 70 minutes as 1 hour , 10 minutes)
2) subtract time
Hours : minutes
+ 60
6 80
7 : 20
2 : 40
4 : 40
10
