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\ 04-Oct-2025 Bharat arora Proof-9 Reader’s Sign _______________________ Date __________
Addition And subtrACtion using exPAnded form
example 1: Add: 33 + 45 example 2: Subtract: 78 – 33
Solution: Solution:
Tens Ones Tens Ones
3 3 = 3 tens + 3 ones 7 8 = 7 tens + 8 ones
+ 4 5 = 4 tens + 5 ones – 3 3 = 3 tens + 3 ones
7 8 = 7 tens + 8 ones 4 5 = 4 tens + 5 ones
There are two subtraction facts for 33 + 45 = 78. One is 78 – 33 = 45, as shown
above. Write the other one. __________
Practice time 7g
1. Add the following by expanding the numbers.
(a) 34 and 23 (b) 45 and 23
Tens Ones Tens Ones
= + = +
+ = + + = +
= + = +
(c) 41 and 32 (d) 55 and 11
Tens Ones Tens Ones
= + = +
+ = + + = +
= + = +
(e) 67 and 31 (f) 14 and 61
Tens Ones Tens Ones
= + = +
+ = + + = +
= + = +
112 Mathematics-1
