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E:\Working\Focus_Learning\Math_Genius_1_(05-10-2023)\Open_Files\08_Chap_7\Chap_7
\ 11-Sep-2024 Bharat arora Proof-6 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 78 – 33 = 45 is done 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
