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Arrow-Puffin-3_Semester-1 Maths 119ESTIMATION OF SUMBefore we estimate the sum of two numbers, we round the given addends to the nearest tens, hundreds or thousands and then add them.Rounding the numbers is to make numbers simpler.Example 1 : Estimate the sum of 32 and 57 to the nearest 10.T O3 0+ 6 09 0T O3 2+ 5 7 8 9estimatedvalue3. There are 3725 boys and 3085 girls in a school. How many children are there altogether?4. In a superbazar, there are 1217 bags of rice, 935 bags of wheat and 855 bags of sugar. Find the total number of bags.5. Chandu spends `2350 on food, `1500 on petrol and `1600 on other things. How much does he spend altogether?6. A bus travels 1520 km on the first day, 1327 km on the second day and 1208 km on the third day. What is the total distance travelled by the bus?7. In a city, there are 1845 schools and 758 colleges. How many schools and colleges are there in all?8. In a town, there are 3457 men, 3216 women and 2201 children. Find the population of the town.9. There are 2689 hens, 1028 cows and 3845 sheep on a farm. Find the total number of animals on the farm.10. A milkman sells 1250 litres on one day and 1885 litres the next day. How many litres of milk does he sell altogether?Let's Understand Conceptual Understanding