Measurements

Addition and subtraction

Example 1: Rahul's pencil is 15 cm long, Sara's pencil is 12 cm long. What is the total length of both the pencils?

To find total length, we will add both lengths

Always add the smaller unit of measurement first. We can only add the same units of measurements. For example, meters cannot be added to liters

Example 2: A tailor uses 1 m 42 cm of cloth to make a shirt for Ali and 1 m 20 cm to make a shirt for Rahul. How much cloth will he use in total?

Let's add the given lengths

The tailor will use 2 m 62 cm of cloth to make both shirts

Example 3: A shopkeeper has 38 m long rope. If he cute 12 m out of It, how much length of the rope will be left?

Let's subtract 12 m from 38 m

Let's now subtract 1 m 26 cm from 2 m 41 cm

The answer is 1 m 15 cm

A bus travelled 1 km 380 m from first stop to second stop. Then, it travellad 2 km 420 m to the third stop. How much did it travel in total? Let's subtract 12 m from 38 m. The answer is 1 m 15 cm.

We will add 1 km 380 m and 2 km 420 m.

 Metre is smaller unit of measurement. So, we will add metres first and kilometers next

Example 4: There is 4 L 850 mL water in a bucket. 3 L 840 mL was removed from it. How much water is left?