Page 38 - Math Genius C2

E:\Working\Orange_Education\Math_Genius_2\Open_Files\Chap_02
\ 26-Sep-2025 Bharat Arora Proof-10 Reader’s Sign _______________________ Date __________

Ritika: We have to add the number of garlands.

Ritika adds 19 + 16 garlands in the Mansi says that we can also add the
following way. numbers in another way as shown below.

Start from 19 and count forward 16
steps. We reach 35.

+10
+1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1

18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
So, 19 + 16 = 35. Thus, 19 + 16 = 19 + 10 + 6 = 29 + 6 = 35.

ADDITION ON The Number GrID

Joseph is in class 2. He scored 52 marks in a 1 2 3 4 5 6 7 8 9 10

Maths test and 18 marks in a Maths project. 11 12 13 14 15 16 17 18 19 20
He wants to find the total marks he scored in

Maths. 21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40
He uses a 100-number grid to find the total as

shown below. 41 42 43 44 45 46 47 48 49 50
51 52 53 54 55 56 57 58 59 60
52 + 18 = 52 + 10 + 8 61 62 63 64 65 66 67 68 69 70

He starts from the bigger number, 52; moves 71 72 73 74 75 76 77 78 79 80

1 row downwards to add 1 ten and reaches 62. 81 82 83 84 85 86 87 88 89 90
Then, he counts 8 columns to the right to add 91 92 93 94 95 96 97 98 99 100

8 ones and at last he reaches 70.
Be Aware
52 To add 10, 20, 30, ..., we just move downwards

by 1 row, 2 rows, 3 rows, ... respectively.
+10

62 63 64 65 66 67 68 69 70
+1 +1 +1 +1 +1 +1 +1 +1
Thus, he scored 52 + 18 = 70 marks.

Fast Check Art Integration
Colour the smiley/s in which the total is bigger than 46.

1. 25 + 26 2. 30 + 1 3. 18 + 39 4. 15 + 15

36 Mathematics-2