Page 34 - Viva

(d) In a playground, 18 children are playing
badminton, 24 children are playing cricket

and 33 children are playing football. How
many children are there in the playground?
There are ______ children in the playground.

(e) There are 102 chocolates in a box, 203 dark
chocolates on a tray and 403 milk chocolates
in a packet. How many chocolates are there
in all?

There are ______ chocolates in all.

(f) Rashi sold 237 tickets, Manmeet sold 461
tickets and Anuradha sold 245 tickets for
their school fest. How many tickets did they
sell in all?

They sold ______ tickets in all.

(g) During a book fair in a school, 123 books
were sold on the first day, 198 books on the

second day and 233 books on the third day.
How many books were sold in these three
days?

______ books were sold.

(h) A postman delivered 521 letters in the first
week and 439 letters in the second week. How
many letters did he deliver in two weeks?

He delivered ______ letters in two weeks.

Addition of 2-Digit Numbers Mentally

Method 1: Break the numbers to be added into tens and ones. Add the tens and ones
separately. Then, add the numbers to get the final sum.

Example 11: Add 36 and 20.
Solution: 36 + 20 = 30 + 6 + 20 (breaking into tens and ones)

= (30 + 20) + 6 (adding tens and ones separately)
= 50 + 6 = 56

Method 2: Round off the bigger number to the nearest 10. Add the two numbers and then
correct the sum.

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