Page 107 - MathGenius-C1-Flipbook

E:\Working\Orange_Education\Math_Genius_1\Open_Files\Chap_7
\ 04-Oct-2025 Bharat arora Proof-9 Reader’s Sign _______________________ Date __________

Practice time 7A

Add the following.
1. Tens Ones 2. Tens Ones 3. Tens Ones 4. Tens Ones

1 5 4 1 2 5 5 8

+ 4 + 6 + 3 + 0

5. Tens Ones 6. Tens Ones 7. Tens Ones Think Tank

7 4 8 1 6 2 Imagine you had 29 candies
in a bowl. You added a few
+ 4 + 7 + 7 more candies and now you
have 34 candies.

How many candies did you
add?
Addition in tens

example 1: Add 20 and 30.

Solution: We first take 2 tens and 3 tens. Then count and find 5 tens in all.
Tens Ones

2 0
+ = + 3 0

5 0

2 tens + 3 tens = 5 tens
Thus, 20 + 30 = 50.

example 2: Add 30 and 10.

Solution: We already have 3 tens. If we get 1 more ten, we will have 4 tens in all.

Tens Ones

3 0
+ = + 1 0

4 0

3 tens + 1 ten = 4 tens

Thus, 30 + 10 = 40.

Mathematics-1 105