Conversion of metric units, metric measurement table, Addition and subtraction in the metric system.
↑ move up in the table, each units is 10 times the previous unit.
↓ move down in the table, each units is 1/10 of the previous unit.
The commonly used metric units are :
1) Length: metre(m), centimetre(cm), millimetre(mm), kilometre(km)
2) Wighth: gram(g), kilogram(kg)
3) Capacity: litre(l), millilitre(ml)
1 m = 100 cm. so, to convert from m to cm, multiply by 100.
Example 1 : Convert 8 m to cm.
8 m = 8 × 100 cm = 800 cm
Example 2 : Drawing room in the school is 5 m 25 cm long. How many cm is that ?
5 m 25 cm = 5 × 100 cm + 25 cm
= 500 cm + 25 cm = 525 cm
1 cm = 10 mm. so, to convert from cm to mm, multiply by 10.
Example 1 : Convert 7 cm to mm.
7 cm = 7 × 10 mm = 70 mm
Example 2 : There is lizard with 5 cm 8 mm long. How many mm long is that ?
5 cm 8 mm = 5 × 10 mm + 8 mm
= 50 mm + 8 mm = 58 mm
1 km = 1000 m. so, to convert from km to m, multiply by 1000.
Example 1 : Convert 5 km to m.
5 km = 5 × 1000 m = 5000 m
Example 2 : A camel can walk 2 km 350 m in 1 hour. How many metres can camel walk in an hour ?
2 km 350 m = 2 × 1000 m + 350 m
= 2000 m + 350 m = 2350 m
100 cm = 1 m. so, to convert from cm to m, divide by 100.
Example 1 : Convert 675 cm into m and cm.
675 cm = 600 cm + 75 cm
= 675 ÷ 100 = 6.75 cm
= 6 m + 75 cm = 6 m 75 cm
10 mm = 1 cm. so, to convert from mm to cm, divide by 10.
Example 1 : Convert 66 cm into cm and mm.
66 mm = 60 mm + 6 mm
= 66 ÷ 10 = 6.6 mm
= 6 cm 6 mm
1000 m = 1 km. so, to convert from m to km, divide by 1000.
Example 1 : Convert 3848 m into km and m.
3848 m = 3848 ÷ 1000 = 3.848
= 3 km + 848 m
1 kg = 1000 g
To convert from kg to g, multiply by 1000
Example 1 : Convert 3 kg to g.
3 kg = 3 × 1000 g = 3000 g
Example 2 :
Leo is a cat. His weight is 2 kg 475 g. How many grams is that ?
2 kg 475 g = 2 × 1000 + 475 g = 2000 g + 475 g
= 2475 g
To convert from g to kg, divide by 1000
Example 1 : Convert 4555 g into kg and g.
4555 g = 4000 g + 555 g
= 4000 ÷ 1000 + 555 g
= 4 kg 555 g
1 l = 1000 ml
To convert from l to ml, multiply by 1000
Example 1 : Convert 10 l into millimetres.
10 l = 10 × 1000 ml
= 10000 ml
Example 2 : Convert 5 l 995 ml into millimetres.
5l 995 ml = 5 × 1000 ml + 995 ml
= 5000 ml + 995 ml
= 5995 ml
To convert from ml to l, divide by 1000
Example 1 : 15,865 ml of milk was poured into a bucket. How many l and ml is that?.
15,865 ml = 15,000 ml + 865 ml
= 15,000 ÷ 1000 and 865 ml
= 15 l 865 ml
Example 1: Add 48 l 360 ml and 64 l 90 ml
Step 1: Add millimetres. 360 ml + 90 ml = 450 ml
Put 450 in the ml column.
Step 2: Add litres. 48 l + 64 l = 112 l
Put 112 in the l column.
92 < 432
So, change 1l to ml.You have 1092 ml
1092 ml - 432 ml = 660 ml
Put 660 in the ml column.
83 l - 56 l = 27 l. Put 27 l in the column l.
Example 1: Mr. Bush drank 8 glasses of water in a day. If the capacity of a glass is 250 ml, how much water did he drink?
Capacity of 1 glass = 250 ml
Capacity of 8 glasses = 8 × 250 ml = 2000 ml = 2 l
Example 2: 1 kg of sugar is equally divided between 5 friends. How much did each friend get?
5 friends got 1 kg = 1000 g of sugar.
1 friend got 1000 g ÷ 5 = 200 g
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