Compare, Add, and Subtract Different Units of Measure

In this activity, we are going to be comparing, adding, and subtracting some measures.

 

We'll need to convert some measures as some objects will be in a different unit of measure.

 

We'll need to know these facts:

 

10 mm = 1 cm

100 cm = 1 m

1,000 m = 1 km

1,000 g = 1 kg

1,000 ml = 1 l

 

Let's get started.

 

           A                               B

     

     

Jug A has 2 litres of orange.

Jug B has 600 ml of orange.

How much orange is there altogether?

 

Answer:

In this question, we need to convert the units of measure so that they are the same.

We know that 2 l = 2,000 ml 

Jug A  = 2,000 ml

Jug B = 600 ml

 

2,000 + 600 = 2,600 ml

There is 2,600 ml of orange juice.

 

We can convert this back to litres by dividing by 1,000

2,600 ÷ 1,000 = 2.6 litres.

 

Let's have a look at another question.

 

       

 

The chair is 98 cm tall.

How tall would two chairs be?

 

Answer:

In this question, we simply need to add 98 cm and 98 cm = 196 cm

Two chairs would measure 196 cm

 

Let's have a look at one more question.

 

 

 The shopping bag weighs 1,100 g

The blue rucksack weighs 1.2 kg

 Which bag is heavier?

 

 Answer:

We need to convert both measures to the same unit of measure.

 

There are 1,000 g in 1 kg

1,100 g = 1.1 kg (divide by 1,000)

 

Shopping bag = 1.1 kg

Rucksack = 1.2 kg

The rucksack is the heaviest.

 

 

Now it's your turn to have a go at some questions!