Page 31 - ICSE Math 5

Now, 13 – 5 = 8 TL L TTh Th H T O
(sum – one addend = other 1
addend). 3 ? 8 ? 7 ? 5
So, we write 8 in the blank space. + ? 1 ? 4 9 6 8

Since 13 is a 2-digit number, 5 9 4 1 ? 8 3
keep the 3 ones as it is and carry
over 1 to the tens place.
Step 2: Look at the tens column
TL L TTh Th H T O
1 + ? + 6 = 8
1
3 ? 8 ? 7 1 5
7 + ? = 8
+ ? 1 ? 4 9 6 8
8 is more than 7.

We know that 7 + 1 = 8. 5 9 4 1 ? 8 3
So, we write 1 in the blank space.

Step 3: Continue in the same manner TL L TTh Th H T O
to get all the missing digits. 1 1 1 1
3 7 8 6 7 1 5

+ 2 1 5 4 9 6 8

5 9 4 1 6 8 3

Exercise 3.1

1. Add the given numbers.

(a) 21,406; 37,582 and 10,275 (b) 7,13,246; 32,708 and 15,001
(c) 1,05,032; 2,67,914 and 3,10,578 (d) 8,75,061; 4,289 and 35

(e) 4,36,15,207; 19,62,34,518 and 30,65,420 (f) 4,47,36,152; 5,736 and 1,89,25,024
2. Find the sum of the following numbers and write the number names for the sum
obtained.

(a) 75,92,48,705; 2,00,83,780 and 6,66,66,666
(b) 9,21,317; 15,706; 85,30,100 and 20,65,915

3. Find the missing digits.

(a) TC C TL L TTh Th H T O (b) TC C TL L TTh Th H T O

9?7 ? 1 ? ? 6 65 ? ? 0 8 5 ? 3
+ ? 4 6 ? 9 ? 9 7 ? + 2 ? 9 8 5 7 ?8?

2 ? 0 7 0 0 522 ? 505 ? ? 0 0 2

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